Board Thread:General Discussion/@comment-3123266-20140303175822/@comment-4928711-20140602154701

I doubt Ultron will be as popular as Loki. I don't think Marvel will have a villain like Ultron in Avengers 2 the raise the stakes in Avengers 3 with Thanos and the power stones and bring it back to Ultron for Avengers 4. I don't think Marvel would bring back a villain in the Avengers series. Loki appeared in one Avengers film as main villain and appeared in one Thor film as main villain. I can see Ultron doing something similar. He could appear in Avengers: Age of Ultron and perhaps Ant Man 2, but not within the same series multiple times.