What If... Ultron Won? - S1-E8
Plot hole: At the end of the previous episode, the Watcher gets surprised (literally saying "wait, what?") by the arrival of Infinity Ultron inside Party Thor's universe.In this episode we find out the story of Ultron.Ultron realises for the first time that there are other universes to conquer right then because he can'hear' the Watcher talk (to whom?) and goes after him.So the two episodes don't match;Ultron couldn't have reached the other universe "before" his realization, and Uatu is again surprised by it.
What If... Ultron Won? - S1-E8
Other mistake: Ultron exterminates the world population quite literally nuking the planet. Black Widow and Hawkeye survive because they are in the air during the global inferno (that's not really how it works) and for the rest of the episode they saunter about on a world full of the deadliest level of radiation in a nuclear winter (electricity and cellular phones work, too).
What If... Ultron Won? - S1-E8
Plot hole: Ultron cuts through Thanos like butter and acquires the Infinity Stones. He does so after he kills all life on the planet (-2). So Thanos has all the Stones (except Vision/Ultron's) years earlier than normal continuity, for no reason. Not just that; Ultron proceeds then to 'silence' the rest of the universe one planet at a time (which would take forever; Thanos wanted the gems exactly to avoid doing that and make genocide efficient). Amongst those planets, one where he fights The Guardians of the Galaxy, including...Gamora, who should be dead or Thanos could have never got the Soul gem.
