WandaVision has yet to technically unveil a villain, at least in the traditional sense. Through six episodes, there's been growing tensions between Wanda (Elizabeth Olsen) and SWORD, though an A-list antagonist has yet to enter the fray. Some think it might end up being Evan Peters posing as Mephisto, others think Agnes (Kathryn Hahn) could end up being Nightmare. Regardless, most fans of the Disney+ show hope the revelation happens sooner rather than later. When it comes to social media fan-favorite BossLogic, he already has the arrival of Nightmare planned out perfectly.