Spider-Man: Across the Spider-Verse's MCU line was not approved

Spider-Man: Across the Spider-Verse features a great MCU reference. But the producers revealed it was never approved by Marvel Studios.

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All the Marvel Easter eggs in Spider-Man: Across the Spider-Verse

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Beyond the Spider-Verse' Is Not Delayed

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Spider-Man: Across the Spider-Verse - Wikipedia

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Spider-Man: Across the Spider-Verse” is worth a watch – The Lion's Tale

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Spider-Man: Across the Spider Verse Easter Eggs – The Definitive List – The Hollywood Reporter

Spider-Man: Across the Spider-Verse: Donald Glover Prowler Cameo Explained