The WandaVision star had previously teased this big character reveal, just before the surprising introduction of Evan Peters’ Pietro.
“This is the theory that says there is some mysterious Avenger who is going to appear in ‘WandaVision,’ and people seem to think that mysterious Avenger is Doctor Strange,” Bettany said.
The composer is Christophe Beck, and the theme (for certain episodes) is by Frozen’s Kristen Anderson-Lopez and Robert Lopez.
Featuring nine episodes, WandaVision is directed by Matt Shakman with Jac Schaeffer as head writer.
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Paul Bettany Reacts to WandaVision Fan Theories | Explain This | Esquire