A Sherlock Holmes Cinematic Universe? That’s what Robert Downey Jr. is hoping to kick off with his next Sherlock Holmes movie, Sherlock Holmes 3, currently slated for Christmas 2021.

Playing Iron Man for a decade in the Marvel Cinematic Universe, Downey Jr. has had plenty of experience seeing the benefits (and reaping the rewards) of interconnected storylines running across several movies, and he now plans to apply what he has learnt to Sherlock Holmes.

“At this point, we really feel that there is not a mystery-verse built out anywhere, and [Sherlock Holmes author Sir Arthur] Conan Doyle is the definitive voice in that arena, I think, to this day,” Downey Jr. told Fast Company.

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