With Agatha All Along being a sequel to the events of WandaVision, it's only natural that this new show is inheriting one of the biggest Marvel Cinematic Universe fan theories from the previous one: ...
But how much will Agatha All Along draw on AgathaHarkness' comic book history, and how will her series tie into the MCU? In comic books, AgathaHarkness is the very picture of an old lady ...