Filmmaker Bryan Singer is pulling double-duty these days, working in post-production on X-Men: Days of Future Past while working on the script for X-Men: Apocalypse. There isn't much we know about the story, except that the main villain Apocalypse will not be an alien, and the film will be set in the 1970s, following the younger group of mutants from X-Men: First Class.

During a recent interview, Bryan Singer said X-Men: Apocalypse will delve into mutant origins, which makes sense since, in the Marvel comic books, Apocalypse is the very first mutant, born in Egypt around the year 3,000 B.C.

"It will also address historical mutant-cy, meaning the deep past, mutant origins and things like that. It's something that's always intrigued me when we think about our Gods and our history and miracles and powers."

We also reported last month that there will be an end credit sequence in X-Men: Days of Future Past that will set up the events of X-Men: Apocalypse, with Apocalypse coming to Earth and essentially "merging" with Michael Fassbender's Magneto. Although that report still hasn't been confirmed by the studio, Bryan Singer said that he is deciding whether or not to use an end credits sequence for X-Men: Days of Future Past, although something in this summer's adventure will directly tie into X-Men: Apocalypse.

"I'm still deciding that. Something that happens in this movie causes what's going to happen in that movie."

The filmmaker was confirmed to direct the sequel last month, although it seems he still hasn't finalized his deal yet.

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"I'm co-writing the story and I'm producing it. I'm negotiating to direct. We're in the process. We're trying to figure it out, schedules. My desire would be to direct it."

Bryan Singer also tweeted a photo in December that showed him working on the story with X2: X-Men United writers Dan Harris and Michael Dougherty, which also teased that the story could be set in Egpyt, where Apocalypse a.k.a. En Sabah Nur was born.