So guys, get this. What if quicksilver is actually Mephisto!!

Right, got that out the way. So there’s some gaps in this theory that still need working out, but after rewatching episode 6 I’ve come to the possible conclusion that Quicksilver, aka Evan Peters is NOT replacing pietro from the MCU, is not him from another dimension or anything like that. I’m thinking he is literally the same character he always was from xmen, but they’ve merged the universes together... after the events of the xmen films he goes to work for SWORD. Having the same super speed power and learning pietros backstory he’s able to convince wanda that he’s her dead brother. He’s been sent in by Haywood to infiltrate and get information. Note how he dodges any personal questions about their past that he can’t answer and several times he tries to dig for info...

Jumping off point for a better theory maybe?