According to Entertainment Weekly on Jan. 7, director Bryan Singer mentioned that "X-Men: Apocalypse" would delve into the history of mutant origins. He was unsure if "X-Men: Days of Future Past" will have an end tease that would lead to the follow-up sequel because whatever occurs in one film will directly lead to the other.
“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".
This would be rather representative of the fact that Apocalypse is god-like in nature to primitives and also he is the first existing mutant. Singer historically already teased a Twitter picture of him and his staff of writers "X-Men: Days of Future Past's" Simon Kinberg as well as "X2's" Dan Harris and Michael Dougherty. The tweet said, "Late night #XMen #Apocalypse story session. #SimonKinberg @DanimalHarris @Mike_Dougherty It's snowing in Egypt!"
For those not familiar with the Apocalypse character, his real name is En Sabah Nur and was born around 5,000 years ago. He was left abandoned by the community he was born into due to his malformed appearance. Later on, a nomadic tribe slaughtered En Sabah Nur's people and was adopted by the raiders. The leader of the nomadic group saw great power from the child and thus coined him the name translated "The First One". It seems that such a name is appropriate to the origin of mutants that director Singer is alluding to.
"X-Men: Apocalypse" is scheduled to be released May 27, 2016.