Director Bryan Singer is currently pulling double duty, putting the finishing touches on X-Men: Days of Future Past while working on the story for X-Men: Apocalypse. During a recent interview with Entertainment Weekly, the filmmaker revealed that X-Men: Days of Future Past directly ties in to X-Men: Apocalypse, although fans won't quite realize that right away.

"You won't feel at the end of the movie that it set up Apocalypse. What it does is it sets up possibilities. But what we'll discover in Apocalypse is that events in this movie made that happen. Apocalypse deals with ancient mutancy. What would humans have thought mutants were? What would mutants think humans were? You're dealing with gods and things like that. And what if one survived and what if that found its way into our world?"

Writer-producer Simon Kinberg revealed that X-Men: Apocalypse will actually be bigger than X-Men: Days of Future Past, which has been called the biggest movie 20th Century Fox has produced since Avatar.

"From a visual standpoint it actually may be a bigger movie than X-Men: Days of Future Past because there'll be disaster movie imagery, like the title would imply."

The story, which the director is currently working on with writer-producer Simon Kinberg and X2: X-Men United writers Dan Harris and Michael Dougherty, is loosely based on the 1990 comic story line Age of Apocalypse, which features the ancient mutant Apocalypse and an alternate universe. However, the director revealed this movie won't exactly create an alternate universe.

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"[The movie] won't necessarily create an alternate universe, but there may be some swapping things that I'm playing with."

The story will follow Charles (James McAvoy), Erik (Michael Fassbender), Mystique (Jennifer Lawrence) and Hank (Nicholas Hoult), and Bryan Singer reiterated a report from last month that he wants to bring back mutants Gambit and Nightcrawler, although he wants to show them at different ages.

"I'm excited because I want to start introducing familiar characters at different ages and also explore the '80s."