According to Comic Book Resources on Jan. 30, "X-Men: Days of Future Past's" Bryan Singer reveals certain details about "X-Men: Apocalypse" during his interview with Empire magazine. He mentioned that the future film will be more of a "X-Men: First Class" sequel and specifically names Michael Fassbender, Jennifer Lawrence, and James McAvoy as the returning celebrities for the project.
There will not be any X-Men characters from the first three movies and dismisses the internet rumor about the post credits scene to "X-Men: Days of Future Past" will feature Magneto being possessed by Apocalypse.
"People were concerned we were making Apocalypse an alien. It's odd. I don't know where that came from".
It could be speculated that this could have been only knee jerk reaction from fans because a lot of film sequels tend to lend to some kind of alien origin. At this point, Singer is holding true to the original origin of Apocalypse. He will still be the "thousands-year-old mutant".
Singer thinks that "without the benefit of science" that one may wonder that if mutants existed thousands of years ago, people then may have thought of them as gods, titans, demons, etc. Also, if ancient mutants had existed that long ago, how many of them survived the way that Apocalypse had? Though, Apocalypse had come across technologies during those days that had kept him in stasis and make his appearances known at certain times.
At this point, Singer is slated to produce and co-writer of the film and hopes to be at the helm as well.
"X-Men: Days of Future Past" is set to release come May 23 and "X-Men: Apocalypse will follow on May 27, 2016.