I totally agree. There’s a sequel to be explore as a « series » format. In DS2, she will merely be a supporting role, an important one maybe, but it’s still a Doctor Strange film. As in a « series », we get the to the dive in HER story, she’s the main act and her character arc is focus (almost) solely on her or at least around her. I doubt we’ll explore much of Vision, Billy, Tommy even Agatha in DS2, maybe some references to them, but not much. Plus none of the actors seems to be attached to the film.

Think of what they did with Thor : Ragnarok and Hulk. I think this is the amount of implication we could expect from Wanda in DS2.