In Marvel's What If...? episode 8, Ultron annihilates the universe, and then sets about destroying the multiverse.

In Marvel's What If...? episode 9, which marks the first season finale of the animated MCU series, the Guardians of the Multiverse assemble.

The episode took place after the events of Thor: Ragnarok. Furthermore, in this alternate reality, the events of this zombie apocalypse replaced the events of what could have been the Infinity War ...