WandaVision follow. So, Mephisto wasn't the one pulling the strings in Westview after all. Right from the start, fans assumed the demonic Marvel Comics villain would be revealed as WandaVision's big bad, and the show even dropped a few hints that this would be the case. Add in some "leaked" merchandise photos, and many viewers were convinced that we'd see the character in the recent series finale. Of course, that didn't end up happening ("it was Agatha all along"), and from the sounds of things, Mephisto never factored in to any early plans for the story. During an interview with