Infinity Saga: 10 Unresolved Plot Points From MCU's Phases 1-3
4. Did The Vision Really Kill Ultron?
Ultron remains one of the Marvel Cinematic Universe's best villains, but there was definitely some ambiguity surrounding his "death" at the hands of The Vision in Avengers: Age of Ultron. Yes, we saw a flash of light, but did the android really put a permanent end to his creator?
We're not convinced, and it would be a tremendous waste for Ultron to be a one and done villain in this shared world. In the comic books, he's plagued Earth's Mightiest Heroes again and again, and even squared off with the Guardians of the Galaxy when he travelled into outer space.
A non-canon VR game set in the MCU brought Ultron back, so you have to believe this is something Marvel Studios has considered at some point over the past few years. The way Whedon shot his defeat in a way that left the door open (even it is just a crack) is hard to ignore, and we would definitely appreciate some clarification when The Vision makes his return in Disney+'s WandaVision TV show.