Evan Peters made his Marvel debut as Quicksilver in 2014's X-Men: Days of Future Past. Later, Peters made his surprise Marvel Cinematic Universe debut in WandaVision. We'd eventually learn that he was simply a Westview resident, Ralph Bohner, who had fallen under Agatha Harkness's spell. So, there's that scene where I'm upstairs in my man cave, and I'm explaining to [Monica Rambeau]...she looks at the headshot, and she says 'Ralph Bohner!' If it does happen, it seems more likely that Marvel Studios will have convinced Avengers: Age of Ultron star Taylor-Johnson to return.