Viewers should probably also be up on the Disney+ series “WandaVision,” in which Wanda Maximoff (Elizabeth Olsen) used her own magic powers to create an artificial reality in which her husband Vision had not died and the two of them had a pair of adorable sons in a sitcom-perfect suburb. “Multiverse of Madness” is a sequel to “Doctor Strange,” with the ex-Sorcerer Supreme (played by Benedict Cumberbatch) taking on a new threat to reality itself. ‘Doctor Strange in the Multiverse of Madness’ Trailer: Doctor Strange Comes Face to Face With Strange Supreme (Video)