Wait A Minute! Isn’t Quicksilver In Avengers: Age Of Ultron, Too?
He is. Before returning for X-Men: Apocalypse, the faster-than-light scrappy kid with terrible hair will make an appearance in next summer’s Avengers: Age Of Ultron. In fact, if you’re a Marvel fan, then you’ve likely already seen him in the post-credits sequence for Captain America: The Winter Soldier, where he’s imprisoned with his sister, Scarlet Witch.
Thing is, in Marvel’s Cinematic Universe he’s played by Aaron Taylor-Johnson, not Evan Peters.
The crux of this matter boils down to rights. The sibling duo first appeared (in the comic canon) in X-Men #4 as the offspring of Magneto, and later absconded to do good for The Avengers – all perfectly normal in the tangled web of Marvel’s comic continuity. When it comes to the big screen, though, Fox (who own the movie rights to X-Men) are within their rights to include Quicksilver and Scarlet Witch. However, Marvel (who birthed the characters in the comics) are also entitled to use the characters in their movies.
The stipulation here, as addressed by Marvel’s creative head Kevin Feige, is that during their stint in Fox’s X-Men franchise, their alliance with The Avengers cannot be referenced. Similarly, in Avengers: Age Of Ultron, their mutant past will be re-written to erase their X-Men origins.