Ultron (Earth-149)

"You dare challenge ultimate perfection?!"

- - Ultron to Superman

Ultron is a major supervillain and sociopath robot who comes from a future timeline. He is the ultimate creation of Dr. Hank Pym, designed to possess all the abilities of the greatest fighters to have ever inhabited or visited Earth; the result is a "perfect warrior", possessing numerous favorable traits and special abilities. Ultron is the only few Pym Androids not directly completed by Pym himself.

Early Life
Cell's basic design was thought up by Dr. Hank Pym as the ultimate artificial human while Pym was in a good mood due to successfully completing Jocasta. Ultron's original form floated in Dr. Pym's secret basement laboratory. In the present timeline, the Present Ultron is killed by Future Damian Wayne and Aang when they discover the basement (which included some blueprints).

In Future Damian' timeline, Future Ultron is alive, searching for the Androids, when Future Damian returns from the present timeline, but gets killed by Future Damian' S.H.I.E.L.D. Attack. In another alternate timeline, Ultron grows to full-size, cracks out of the machine, turns from a nanobot into its imperfect form, kills Future Damian in order to steal his TARDIS, reverts to his nanobot form, and travels back to the present timeline in order to absorb Vision and Jocasta.