Writer Simon Kinberg confirms “X-Men: Apocalypse” is the final installment of the “First Class” trilogy.

Kinberg spoke with Collider about the upcoming film, claiming the end of the trilogy doesn’t mean fans won’t get to see their favorite actors on in the franchise ever again.

“I will say that [X-Men: Apocalypse] is definitely the close of a trilogy for those First Class characters, which isn’t to say we won’t see them in future movies, hopefully we will, but it’s a completion of an arc for them,” Kinbeg said.

“I think that the friendship between Erik and Charles, which has always been so integral to the franchise, is something we’re continuing to explore and hopefully deepen with Apocalypse. And the relationship between Beast and Mystique is a really interesting one that we didn’t have a lot of time to explore in Days of Future Past, so we’ll have an opportunity to do more of that in Apocalypse.”

Kinberg said Mystique will be the center of attention in “Apocalypse.” Her relationship with Professor X and Magneto will continue make a huge impact on the storyline, as Mystique lives by her own moral compass.

“Part of what’s really interesting about Mystique’s character is that she is, in some ways, the child of both Erik and Charles,” Kinberg told Collider. “She grew up with Charles and then she sort of became a woman with Erik, so her being the cross-pollination, if you will, of those two philosophies and those two men is something we can explore in the movie too.”

As for “X-Men: Apocalypse” setting, Kinberg explained the production is having fun with the 1980s throwback.

 “We’re having a lot of fun with the idea of the 80s. It’s a decade that Bryan and I both grew up in and so the music, the style, the aesthetic, the legacy of 80s movies is something we’re really having fun with,” he said.

“X-Men: Apocalypse” is slated to hit theaters on May 18, 2016.