WandaVision: 5 MCU Characters We Could See

Agatha Harkness, in the original comics, is Scarlet Witch's mentor and helps her through the majority of her life. Harkness is a fellow sorceress and she is much older than either of our protagonists, meaning she has been witness to many of the major events in Marvel Comics history.

It seems possible that an adaptation of Harkness is already in the WandaVision series as their very own nosy neighbour, Agnes. Kathryn Hahn's character seems as though she knows more than she's letting on, which could suggest that she is portraying a modern version of the one and only Agatha Harkness.

If it comes to be revealed that Agnes is, in fact, the MCU's answer to Harkness, then it would seem fitting for this series to follow a House of M style storyline - the Maximoff/Vision children had better keep one eye open... or they could look to another relative for help.