When Elizabeth Olsen debuted as Scarlet Witch in “Age Of Ultron,” we didn’t really know what to make of her powers. In the films thereafter, we heard a lot of talk about how powerful she was. Still, other than not dying the instant she tried to punch Thanos in the face in “Avengers: Endgame,” there was nothing specific or special about the red glow that emanated from Scarlet Witch’s hands. Until now, that is. The latest teaser for the upcoming Marvel TV show, “WandaVision,” promises to show us what Scarlet Witch can do finally, all the while providing a meta sitcom fun time.