Mephisto
They have to do it at some point, right? In nearly every Marvel TV show involving magic since WandaVision, fans have wrongly predicted the appearance of Mephisto, the closest thing Marvel has to Satan. As the master of his own hellish pocket dimension, in the comics Mephisto has trapped the soul of Doctor Doom’s mother and really can’t be killed as long as there’s evil in the world. He’s a few wrong turns down the Dark Dimension from appearing, and Riri playing around with magical sigils could lead her to the devil’s doorstep. Or she may be resorting to magic because the devil is already here.
