Doctor Strange is my favorite character, so I'm hyped for this. Can't wait to see Nightmare. Don't really see the need for Wanda though, because her powers in the MCU aren't magical. She moves stuff telekinetically. Not up the same alley as Strange & Co.
@Flerken Feige has actually previously said that Wanda's powers are magical in nature and that the energy she channels is dimensional energy, just like Strange and the other sorcerers, but her's is more chaotic, like her chaos magic from the comics.