Apocalypse

Bio-History:

In Sinister's apartment, he spoke to a Lord Apocalypse which was a stuffed effigy, but while Sinister was imprisoned in the Triskelion, Apocalypse appears to Essex and commands him to choke himself. Sinister mentions that "A child is coming. The master will be reborn", referring to Apocalypse.

At some point after, Sinister is found dead, suffocated by his own shirt crammed into his throat (presumed a suicide). In the future, Cable says he will be training Xavier to fight something he couldn't defeat in his timeline. When asked what is he going to fight, Cable responses "Don't worry Xavier--you'll find out soon enough." while a gigantic statue of Apocalypse is seen.

Sinister returns to life to herald the coming of Apocalypse. He completes his mission of killing ten mutants, five of which are from the Morlocks, the other being Angel. Sinister then transforms into Apocalypse. The X-Men and the Morlocks appear and fight Apocalypse, but are unable to stop him. Apocalypse states to the X-Men that "You've seen but a shadow of my abilities". As S.H.I.E.L.D. attacks Apocalypse, his body transforms into a cyborg-like form. Apocalypse could have the ability to alter his body according to what attacks him.

While Apocalypse is able to repel all attacks with ease, Xavier and Cable say they're too late, but Cable is confident. Xavier almost immediately reveals who he is to Jean while Apocalypse beats S.H.I.E.L.D. agents.

Meanwhile Jean is momentarily shocked about the professor being back, and Jean, Cyclops, Toad, and Iceman are no longer in Apocalypse's control due to Xavier's honed abilities. Cable reveals that he and Bishop were in it together all along and that Professor X is the key to stopping Apocalypse as the Fantastic Four unsuccessfully try to hold off Apocalypse.

Wolverine jumps in at the end of Cable's explanation and tells them all to start fighting. Professor X and Jean share a tender moment on a rocky peak, tells her what to do and then Apocalypse jumps in.

Xavier tries to wipe out Apocalypse psychically, but Cable's plan backfires as Apocalypse is somehow resisting. Apocalypse destroys Xavier's helmet, gives him a bloody nose, and as he is about to kill Cable. Xavier uses his enhanced telekinesis but it is a futile attempt.

As Apocalypse is about to kill Xavier, Jean begs the Phoenix force to help him, and it tells her it knew she would eventually beg for the Phoenix. The Phoenix Force is unleashed and says: I AM FREE! Now you face the wrath of Phoenix! She then attacks him, releasing Xavier. Apocalypse got up to face his opponent. He sensed great power in Phoenix, both mutant and not and he then tried to take it. Phoenix merely taunted his efforts, saying he is facing a god, a force of the universe. She blasted a small fraction of her power at him, as the ancient being tried to hold on as his armor melted. As he lashed at her, Phoenix unleashes her full might against Apocalypse. He tried to resist but her powers soon overwhelmed him that he begs her stop; she complies and Apocalypse's armor shattered, revealing Sinister form. His fate is soon left unknown.