Doctor Strange in the Multiverse of Madness was officially announced during Marvel Studios' Hall H panel at San Diego Comic-Con 2019 where WandaVision was also announced. Aside from the narrative connection between the Phase 4 projects, MCU architect, Kevin Feige, also revealed that Wanda Maximoff will appear in the Benedict Cumberbatch-led sequel.
The new promo of Doctor Strange in the Multiverse of Madness revolves around both Stephen Strange and Wanda Maxmioff facing their darkest fears. While Wanda is seen grappling with her WandaVision past as she dreams of her children who were introduced in the MCU show last year, Doctor Strange, on the other hand, faces a darker version of himself. The teaser showcases Wanda talking about visions and dreams that haunt them. In Doctor Strange's dream, we see him amid a wedding ceremony with his ex, Christine Palmer (Rachel McAdams).
Meanwhile, Raimi notes that it was a challenge for both her and Benedict Cumberbatch to perform all the variants, and that he had a lot of fun directing them. Check out his full comment below:
Yes. The movie is a journey into the multiverse, so you do see different iterations of Benedict Cumberbatch's Doctor Strange, and even Lizzie Olsen's character of Wanda Maximoff. So, the actors have to play that. It's a great challenge for them and great fun to direct them playing these altered versions of themselves.