The cinematic universes of the Avengers and X-Men have finally collided thanks to Evan Peters' WandaVision role. Fans will recall that he played Quicksilver in the X-Men franchise, which — due to the fact that Marvel sold the film rights to the X-Men characters in 1993 — has always been separate from the world of the Avengers. But those rights reverted back after the Disney-Fox merger in 2019, leaving the door open to introduce the X-Men into the MCU.
Peters' casting was first reported in June 2020 by the fan blog Murphy's Multiverse, where a source claimed that Peters filmed scenes for WandaVision in 2019. Disney and Marvel Studios never officially confirmed his casting, but the rumors persisted, and in the Feb. 5 episode, Peters showed up on Wanda's doorstep. "Pietro?" she asked, confounded.
WandaVision makes sense as the show to bring in Peters' character, as Pietro/Quicksilver is Wanda Maximoff's twin in the comics, and WandaVision centers around her. Though actor Aaron Taylor-Johnson played Pietro in Captain America: Winter Soldier, he was killed off in Age of Ultron, and using Peters instead is a tidy way to set up the X-Men's introduction to the MCU. According to The Hollywood Reporter, Disney will likely recast all of the X-Men characters for the Marvel movies. But Peters' Quicksilver wasn't a hugely central character in the Fox films, and his brief cameos made him a fan favorite. In a show as weird and boundary-breaking as WandaVision, it feels right that Peters was brought over from the Fox universe in a meta nod to the Disney-Fox merger.
Still, other fans have theorized that Peters is actually playing the demon Mephisto, an alternate universe Pietro who convinces Wanda to break open the multiverse. (Olsen also stars in Doctor Strange in the Multiverse of Madness, so this theory isn't that far-fetched.) With such a brief appearance, we don't have a lot to go off of. But so far WandaVision has proved to be a show full of surprises, so it's not out of the question.
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