In Marvel Comics, the Illuminati is a secret group that includes Iron Man, Mr Fantastic, and Professor Charles Xavier. Xavier has already been confirmed for the picture, and there have been significant rumours that Tom Cruise will play Superior Iron Man, a variant of Iron Man. Furthermore, John Krasinski is rumoured to be playing Mr Fantastic in the film, bolstering the Illuminati hypothesis. However, while the existence of the group is confirmed in the video, nothing is said about its constitution.
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Doctor Strange 2 is a direct sequel to Spider-Man: No Way Home. Because the film is about variants and the multiverse, there's a chance that multiple performers will appear in cameo roles, either as variations of existing characters or reprising roles from other franchises. Doctor Strange in the Multiverse of Madness, directed by Sam Raimi, is part of Marvel's Phase 4 and will be released in theatres on May 6, 2022.