One of the great struggles in modern filmmaking is what to do with great supporting characters. Sometimes, it’s easy; a new series can be made where they’re heroes in their own right with a new story, and they can go on a journey that leads them from who we fell in love with to a greater version thereof.
When they’re not a hero, though — when they’re a lovable amoral scamp or a villain — things get more complicated. We want to see these characters in their own stories, but to tell those stories, the characters need to learn and grow, and, more often than not, they end up on a similar journey to their hero’s, but it shifts them toward being someone different.
Agatha Harkness (Kathryn Hahn) was one of the antagonists of 2021’s WandaVision, an amoral witch manipulating the hero to steal their powers for herself. She’s a compelling character, and Hahn clearly had a blast playing her. It wasn’t long before people started talking about her getting a series of her own. Marvel responded with Agatha All Along, a series that predictably suffers from the aforementioned problem, at least so far.
Link: https://exclaim.ca/film/article/agatha-all-along-marvel-series-review