The return of Pietro Maximoff (Evan Peters) has been the root of most WandaVision theories over the course of the past couple of weeks. A substantial amount of Marvel fans continue to think the character could be the same one that appeared previously in 20th Century's X-Men franchise. To others, the character might be a front for Mephisto or Nightmare after a Funko toy seemingly teased as much. Regardless of what your favorite theory is, one thing is undeniable: Wanda (Elizabeth Maximoff) finally made a declaration that helped to at least begin clearing the air surrounding the mystery.