While there are a lot of mysteries when it comes to WandaVision the biggest is who or what is the real villain of the Marvel series. Who is really in charge has been a central question almost from episode one with theories suggesting that Wanda (Elizabeth Olsen) is the villain herself, or that someone like Mephisto or even Nightmare is pulling her strings. But with last week's "All-New Halloween Spooktacular!" shaking things up with Vision breaching the energy bubble around Westview and Pietro (Evan Peters) being a part of the main "cast" for Wanda's sitcom world, many people are starting to reconsider who they think is behind it all. That includes Kevin Smith who now says that Mephisto really could be the true villain of WandaVision after all.