Warning! Spoilers ahead for Doctor Strange in the Multiverse of Madness.
Marvel Studios has made the MCU's Illuminati so much worse than the Avengers. Thanks to Doctor Strange in the Multiverse of Madness' multiversal story, Doctor Strange (Benedict Cumberbatch) finds himself traveling through various realities. That includes Earth-838, where a functioning Illuminati team exists, assembled by a version of Doctor Strange that audiences have assumed to be Supreme Strange.
In Marvel comics, the Illuminati is a secret team of superheroes that have tasked themselves with making difficult decisions that affect the world. Marvel Studios debuts its version of the Illuminati through Doctor Strange in the Multiverse of Madness, albeit with a slightly different roster including Captain Carter (Hayley Atwell), Mordo (Chiwetel Ejiofor), and Maria Rambeau's Captain Marvel (Lashana Lynch) with Black Bolt (Anson Mount), Mister Fantastic (John Krasinski), and Professor X (Patrick Stewart). The Illuminati are meant to represent the best of the best of the Marvel universe, but in their MCU depiction, they appear to be much worse than the Avengers in terms of team camaraderie and dysfunction.
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Doctor Strange in the Multiverse of Madness barely offers any context about Earth-838's Illuminati, only that the team was assembled by that Earth's version of Doctor Strange. When the Doctor Strange variant used the forbidden Darkhold to find a way to defeat Thanos (Josh Brolin), it caused an incursion event that destroyed an entire universe. The other Illuminati made the difficult decision that he was now too dangerous to go unchecked and killed him. Despite their dysfunction
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