The actor was considered but ended up not arriving!
WandaVision shocked fans when he brought Evan Peters into the Marvel Cinematic Universe. The actor who played Mercury in Fox’s X-Men returned to live the character of the Disney + series, taking the place that would be Aaron Taylor-Johnson in the franchise.
While the character isn’t really Pietro Maximoff, series director Matt Shakman explained that at the start of the project, there was a time when Taylor-Johnson’s return was considered. He told ComicBook:
“There was definitely talk of bringing Aaron Taylor-Johnson back early on, I think Kevin Feige has talked about it publicly. But he was cast in the very beginning because we knew Agatha would bring Pietro into this world, the false Pietro, to promote his agenda. To make it a redesign, Pietro ended up working for our metalanguage and on top of that, it made thematic sense when we were talking about grieving. Grief clouds your judgment, you are ready to believe things that you would not believe at another time. You are living this fantasy of, “If he’s my brother, even if I don’t know or feel he’s my brother, I’m ready to accept him because I miss him so much.”
WandaVision never considered bringing back other characters from Wanda’s past, like the Ultron played by James Spader in Avengers: Age of Ultron.
“Some mischievous person added James Spader to our IMDB page years ago and he’s never been on the show,” Shakman explained. “Ultron is featured in the series,” Geraldine mentions. It’s an important part of Wanda’s past, but he had no part to play in the story we were building.
WandaVision is the first series from Marvel Studios and is available in 9 episodes on Disney +.