'X-Men: Apocalypse' will be the last part of a trilogy that began with 'First Class', according to writer-producer Simon Kinberg.
The 41-year-old explained that the third installment in the series will conclude the storylines that began in Matthew Vaughn's 2011 film.
The London-born writer told Yahoo: "The thrust of [Apocalypse] is really to complete the trilogy we began with 'First Class' - to complete the stories of young Raven, young Hank, younger Charles and Erik.
"And complete this trilogy of four people who began the films in sort of disparate and in different worlds - even if they knew each other, in the case of Charles and Raven.
"We've followed them over what will be the span of decades... So really that'll be the thrust of that film. There will be familiar characters and new characters that we haven't seen... ever... but it'll be the completion of what we began in First Class."
The 'X-Men' trilogy has featured a host of big name actors and actresses, including James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult.
'X-Men: Apocalypse' is set to debut in UK cinemas on May 19, 2016, and in the US on May 27.

Jason Sudeikis, Josh Gad and Danny McBride have all been named in the all-star voice cast for 'Angry Birds'.
The much-anticipated feature film of the popular game series will also include the likes of Bill Hader, who starred in 'Cloudy with a Chance of Meatballs', Maya Rudolph from 'Bridesmaids' and Peter Dinklage, who's appeared in 'Game of Thrones' and 'X-Men: Days of Future Past'.
Reflecting on the announcement, John Cohen, producer of the film, said: "I'm extremely proud of this cast. Not only do we have Jason, Josh, Danny, Bill, Maya, and Peter bringing these characters to life, but they're surrounded by an all-star ensemble of emerging comedic talent - these are some of the funniest people out there today, and we're thrilled to have them all on board."
Dwight Caines, president of theatrical marketing for Sony Pictures, added: "Our filmmakers are cooking up a hilarious movie, and we know these fans can't wait to see how they're going to bring the Angry Birds' story to life on the big screen of movie theaters."
The 'Angry Birds' movie is written by Jon Vitti - who's best known for his work on 'The Simpsons' - and is set for release in July 2016.

Wallis Day "misses" her former 'Hollyoaks' co-stars but is pleased she left the show.
The 20-year-old beauty quit her role as Holly Cunningham in the Channel 4 soap last year and while she admitted it was disappointing to depart the programme, she insists her exit came at the "perfect time" in her career.
Speaking at the DISARONNO wears VERSACE launch party at One Mayfair in central London last night (30.09.14), she exclusively told BANG Showbiz: "It was sad to leave but at the end of the day I knew that I had to make it as a career choice.
"I'm not dissing soaps because they're fantastic but I never wanted to be in a soap forever.
"At 'Hollyoaks' because they're so nice I felt so comfortable I could've just done that for years. So I felt like last year was probably the perfect time.
"I wanted to keep the ball rolling, I wanted to travel and do all the things I've done really. So I don't regret leaving but of course I miss them.
"I've been travelling and everything since. It literally hasn't stopped."
Wallis has landed a role in forthcoming film 'The Boy with the Thorn in His Side' and admits she is particularly looking forward to filming some of the upcoming scenes in Liverpool, where 'Hollyoaks' is shot, because she is going to use her spare time to meet up with her former co-stars.
She added: "We're filming some of the scenes for my new film in Liverpool soon and I'm going to go up and spend time with my old directors and the cast. I can't wait to see them all again.
"I'm so excited for it. I'm going to see the lovely Step and some of my other friends from the cast. Hopefully we're going to have a good time.
"It'll be something like a Hollyoaks-style reunion party, yeah."
Several other stars also attended the DISARONNO wears VERSACE launch party at One Mayfair last night including singer and model Leah Weller, rapper Wretch 32, singer Diana Vickers, MTV's Lilah Parsons, TOWIE's Sam Faiers and Made In Chelsea's Louise Thompson and Kimberley Garner.
Singer Melissa Steel and models Chris Perceval and Jimmy Q - who had got back from Sao Paulo, Brazil, just 12 hours earlier - were also in attendance at the star-studded bash.

will.i.am believes Cheryl Fernandez-Versini showed "courage" to return to 'The X Factor' as a judge.
The Black Eyed Peas star is very proud of his friend - who he has collaborated with on several occasions since 2008 and managed until last October - for having the guts to work on Simon Cowell's pop star search series following her firing from the US version of the show in 2011.
Speaking on Irish TV show 'Xposé' on TV3, will said: "It took a lot of courage, a lot of thick skin. It took balls for her to go back so hats off to her and her strength."
will.i.am acts as a judge on rival show 'The Voice' and he admits he is going to miss departed mentor Kylie Minogue because she was a good "snuggler".
He said: "Kylie is a sweetheart. She's the perfect snuggler. Yeah you just want to like kind of snuggle Kylie."
Kylie will be replaced on 'The Voice' by Rita Ora. She will join the 'Scream & Shout' hitmaker, Sir Tom Jones and Ricky Wilson on the panel.
Meanwhile, will.i.am has revealed he would love to work with U2 after recently meeting frontman Bono but he accepts it's unlikely to happen.
He said: "Yeah that would be awesome (to work with Bono) but that's dreaming too big. I want to keep my dreams down to earth. I'm already out there."

Rita Ora has been coaching 'X Factor' hopeful Fleur East.
Despite recently being announced as a mentor on rival BBC talent show 'The Voice', the 'Black Widow' hitmaker helped pop star wannabe Fleur prepare for her audition at the Judges' Houses stage on the ITV competition, which airs this weekend.
The pair hit it off after meeting at a festival, and Fleur, 26, admits her friend's advice was invaluable ahead of her performances for her mentor Simon Cowell.
She told the Daily Star newspaper as saying: "I've done a lot of live shows as part of a five-piece band with DJ Fresh, we've done festivals. We did Wireless with Rita Ora and Emilé Sande and Tinie Tempah."
When quizzed on whether she'd asked Rita for help, she added: "Oh yeah, of course! I used to work in a nightclub in Mayfair called Aura and she used to come there every weekend. When I got the DJ Fresh gig, she walked in and went, 'Oh my God, it's you!' She's great, I really like her. She's told me just to enjoy it."
Fleur really enjoyed working with Simon, who is in charge of the over-25s category this year, despite initially thinking he might not get her as an artist.
She said: "Initially I thought maybe Cheryl because she seemed to understand me, whereas Simon was a bit more 50/50. I don't think he was sold. But then I got here and I thought, 'This is going to be a challenge for me. It will be more rewarding.'
"He's the boss man so if he likes you, that means a lot. I was so happy to get him in the end."

Claire Sweeney has given birth to a baby boy.
The 42-year-old presenter and her former fiancé Daniel Riley welcomed their son into the world on Monday (29.09.14) and though the former 'Brookside' star isn't getting much sleep, she is thrilled with the new arrival.
Her representative told MailOnline: "Claire has given birth to a baby boy via C-section at the Catherine Suite in Liverpool Women's Hospital. He was born at 1.58pm on September 29th."
And Claire added: "My baby is beautiful and has me awake every hour breast-feeding."
Claire - who split from Daniel late last year a few weeks before finding out she was pregnant - will stay in hospital with her baby until tomorrow (02.10.14).
Her manager said: "Claire plans to stay in hospital until tomorrow so she and Daniel can rest and enjoy their newborn baby in private."
Though the former couple haven't yet revealed the name of their baby, the actress - who has experienced two miscarriages - previously said she was thinking of calling him Gabriel.
She said: "Finding out I was pregnant was a gorgeous shock - it truly shows that God works in mysterious ways and I think it was just meant to be.
"Actually, I always thought I'd have a little girl, so that was another surprise but a lovely one. I've thought about calling him Gabriel, because he's my little angel sent from heaven."

Ed Sheeran listens to Britney Spears and N-Dubz's greatest hits albums when he is cooking.
The flame-haired singer likes to rustle up his own meals when he is not busy touring the globe and he can't get enough of the 32-year-old singer's successful songs because he is a "big fan" of both her and the pop trio.
He said: "I'm a big Britney fan! I've actually got her greatest hits, I cook to it. I cook to Britney's greatest hits and N-Dubz's greatest hits - what does that say about me? Seriously, I'm not joking."
Ed also admitted he would love to write a song for Britney one day but insists it would resemble her slow song 'Everytime' rather than her more fast-paced effort 'Work Bitch'.
He added: "She's had consistent hits for a while but I wouldn't write 'Work Bitch'. It'd be something a bit more like 'Everytime'. Remember that one?"
When Ed isn't penning tracks for pop superstars he could be found performing at his fans' weddings after he accepted a supporter's invitation to perform at her nuptials in February 2016.
After being asked by the lucky fan at an #AmazonFrontRow Q&A in central London yesterday (30.09.14) whether he would play on her big day, he replied: "That's actually a possibility because I've got nothing booked in February 2016. It's not on my birthday either.
"We should talk. Do you have a card? Give me your work card. I'll drop you a line. If I'm not working then it'll be cool."
Ed Sheeran performed live for customers at the #AmazonFrontRow event at the Amazon London office roof top. For more information on Amazon Music visit www.amazon.co.uk/music

Gloria Estefan wants Ariana Grande to play her in musical 'On Your Feet'.
The 57-year-old singer would love to see the 21-year-old star take to the stage to play her in the production because she has been a big fan of the raven-haired beauty's ever since she saw her doing karaoke on a cruise ship when the 'Problem' hitmaker was just eight years old.
She explained: "Ariana Grande would be somebody wonderful.
"I saw her when she was eight years old on a cruise ship and she had sung this song, and I literally went up to her and told her and her mom, 'I don't know if you plan on doing this, but this is what you need to be doing because you are an amazing singer.' "
Gloria insists the star's karaoke performance was "amazing", especially as she was yet to reach double figures in age.
Speaking to the New York Daily News, she added: "She was doing karaoke and we were listening because I love to go watch that stuff and it was amazing!"
Musical 'On Your Feet', named after Gloria's 1989 hit 'Get One Your Feet', is set to hit Broadway in the summer of 2015.
The play will tell the story of Gloria and her musician husband Emilio Estefan - who she married in 1978 - and their rise to becoming worldwide sensations.
Several hit songs are set to feature in the musical including 'Rhythm Is Gonna Get You', 'Conga', '1-2-3' and 'Live For Loving You'.
Earlier this month, auditions for the production were held in Miami and New York but the cast is yet to be announced.

Amanda Bynes has been thrown out of fashion school.
The troubled actress - who was arrested for driving under the influence (DUI) on Sunday morning (28.09.14) - was reportedly ordered to leave the Fashion Institute of Design and Merchandising in Irvine, California last month for turning up to classes high and paying fellow students to do her homework.
Student Rachel Loritz told TMZ she declined a request from the 28-year-old actress to do her work in exchange for money, but admitted other pupils accepted the offer.
She also claimed the 'Easy A' star often missed classes and when she did arrive she was "clearly high", usually wearing sunglasses and laughing out loud at inappropriate times, though she also got into "horrendous arguments."
The website also claims Amanda was caught cheating during a test and "threw a fit" when she was questioned about it.
It was recently revealed the 'She's the Man' star had moved out of her parents Rick and Lynn Bynes' home in Thousands Oaks, California as soon as her conservatorship ended earlier this month and has reportedly stopped taking her anti-psychotic medication for Schizophrenia and bipolar disorder.
The blonde beauty was arrested at 3am in San Fernando Valley area of Los Angeles after police discovered she was under the influence of a controlled substance, believed to be Adderall, while driving.
Amanda - who was charged with various driving offences in 2012 - is set to appear in court on October 23.

Amal Alamuddin was busy looking for 'Mr. Perfect' before she found George Clooney, her best friend has claimed.
The human rights lawyer was worried she would never meet her soul mate according to her close friend, Jae Kim.
During the couple's romantic Venetian wedding ceremony on Saturday (27.09.14), Jae made a touching speech as she recalled how she and the barrister had been discussing their love lives last summer and how Amal wouldn't settle for less than perfect.
According to People magazine, Jae shared: "[We] stayed up talking late into the night about relationships and whether she would ever meet her partner in life. She had just been picked as the 'Hottest Barrister in London' and I was concerned that this would not work in her favour, as most men found her intimidating already.
"The list of things she was looking for in this man, she readily admitted, could not realistically be found in one person. She was looking for Mr. Perfect, and he was nowhere to be found."
Although she is happy for her friend now, Jae admitted to the wedding party that she had her doubts at the start because of George's reputation as a ladies' man.
She explained: "Is she going to get hurt? He isn't exactly Mr. Commitment, I thought. [But] you could see in the way he held himself, treated her and others, and enjoyed life that his heart was big and he loved her with all of it."

Chris Martin hosted a cocktail party for his estranged wife Gwyneth Paltrow's 42nd birthday.
The famous pair - who announced their marriage separation in March 2014 - have managed to remain on friendly terms, and the Coldplay frontman treated her to the intimate birthday bash at her Los Angeles home.
According to the New York Post newspaper's Page Six column, the star invited some of Gwyneth's colleagues from her lifestyle newsletter, Goop, and some parents whose children attend the same school as their 10-year-old daughter, Apple, and their eight-year-old son, Moses.
Jennifer Aniston, Nicole Ritchie, Kate Hudson and Matt Bellamy also attended the celebration.
Despite their separation, the former couple are still on good terms as an insider confirmed the pair had acted like "best friends" at the birthday bash.
They said: "[Gwyneth and Chris] were very friendly to each other. It was like they're still best friends."
One person who was not there to join in the fun was Chris' rumoured girlfriend, 'The Hunger Games' actress Jennifer Lawrence.
But their relationship is still said to be going strong as they enjoyed a romantic ride on a big wheel in Las Vegas on Friday (26.09.14).
A source said: "The cabins usually accommodate up to 40 people, but Chris and Jennifer booked a private one for some alone time."

Amber Rose caught Wiz Khalifa cheating on her with twin sisters.
DJ Peter Rosenberg - a close friend of the 30-year-old model - claims she walked in on her husband with fashion designers Jas and Ness Rose in their family home before they decided to end their relationship.
He said: "Amber walked in on him with two women at the same time. Twins, twin sisters, twin biological sisters."
However, the DJ admitted the couple - who have 19-month-old son Sebastian together - had been unhappy for some time, though his friend hoped they could work through their problems once Wiz, 27, had finished touring.
He told US radio station Hot 97: "I believe from my relationship with Amber, that she knew they had problems, she knew he wasn't happy - she wasn't happy either - but she was also like, 'He's touring, he's going through a lot, and at some point we're going to work on this again."
And Peter also dismissed suggestions the infidelity occurred at a property Wiz acquired after moving out of the couple's home.
He explained: "It was a home. It wasn't some new home that was just his. It was a home that he had. That she slept in. That's how she got in. She had a key. This wasn't some separate thing. It's a place she goes to."
Peter went on to blast allegations Amber was having an affair with Mariah Carey's estranged husband Nick Cannon, 33.
He added: "She signed with NCredible, Nick Cannon's company. She would never then sleep with the dude that she signed with."
Amber, who married the 'We Dem Boyz' rapper in 2013, filed for divorce last week.