Secret Wars[]

A mind-controlled Ultron (by Doctor Doom) fought Doctor Octopus during the Secret Wars.^[1]

Age of Ultron[]

In a world where Ultron couldn't be stopped after returning to Earth,^[2] the evil A.I. used Vision as a conduit to the past.^[3] Operating the synthozoid, Ultron launched a massive attack on Earth, quickly taking control over the planet, and started remolding it to his own shape. Using numerous sentinel robots with a power almost equal to his, Ultron decimated humankind and killed dozens of heroes.^[4]

The surviving superhumans were forced to retreat to the Savage Land, where some of them used a Time Platform to travel to the future and confront Ultron, but were soon abushed and killed by a swarm of robots as soon as they approached what once was New York City.^[5]