Marvel fans are convinced Aubrey Plaza's Agatha All Along character is the child of a fan-favorite villain
Towards the end of the WandaVision spin-off's opener, Rio attacks Agatha (Kathryn Hahn) at her home in Westview, but the latter wiggles her way out of the brawl by persuading Rio to wait and fight her when she's regained her powers – and is therefore a worthier opponent.