WandaVision Episode 5: 8 Biggest Questions We Need Answering
3. Is This The Same Pietro From The X-Men Movies?
This could turn out to be the biggest and most important character appearance in MCU history. Fans have gone into meltdown since Evan Peters appeared on screen as Wanda's long lost brother Pietro, and the immediate question revolves around the connection between the MCU and Fox's X-Men universe.
Since Peters portrayed Quicksilver in Days of Future Past, Apocalypse, and Dark Phoenix, could his appearance in WandaVision finally be the first step towards bridging the gap between the two previously separate worlds?
How exactly this would be possible could be down to any number of things. Wanda didn't seem to be in control of him, as she seemed genuinely surprised by his appearance on her doorstep, so it could be plausible that her power and CMBR has caused a fracture in the multiverse that she doesn't yet know about, and her subconscious has somehow drawn the alternate Pietro to Westview.
In WandaVision, there aren't really any explanations that could be deemed unreasonable, so it is certainly possible that this is the same character from the X-Men movies that has made the jump to the MCU.
However, this certainly isn't the only option...