
The multiverse is introduced to the MCU in the film Doctor Strange (2016), with director Scott Derrickson noting that the character in the comics had previously "broke open the Marvel comic book universe into the Marvel multiverse".
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The characters Loki, Gwenpool, and Doctor Strange from the comics have been shown to be aware of the MCU's existence. The setting of the franchise was subsequently designated Earth-199999 by Marvel Comics in the hardcover version of the Official Handbook of the Marvel Universe A-Z, Vol. In 2008, the film Iron Man was released, kickstarting the Marvel Cinematic Universe (MCU) media franchise. The main reality featured in the comics, Earth-616, was first named in The Daredevils #7 (1983) by Captain Britain creator David Thorpe in order to differentiate the character from his alternate versions. The concept of the multiverse was then fully explored in What If.? #1 (1977) and Marvel Two-in-One #50 (1979), with the term "multiverse" first used in the What If.? series. In Strange Tales #103 (1962), the character Johnny Storm of the Fantastic Four is teleported to an alternate reality for the first time in Marvel history, with the character sent to the Fifth Dimension (later designated Earth-1612).
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The multiverse was first introduced to the Marvel Comics during the 1960s and 70s.
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2.9 Doctor Strange in the Multiverse of Madness (2022).
