Man of Steel 2 Update, Superman's The Flash Cameo in Limbo

According to a report from Deadline, however, Cavill's future was always up in the air, and it wasn't always a sure thing he'd be back.

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Man of Steel 2 Update, Superman's The Flash Cameo in Limbo

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In the end, he was a pawn: Henry Cavill's Canceled The Flash Cameo Reportedly a Result of The Rock Using Him Like a Chess Piece - FandomWire

CW's Superman & Lois is not connected to the Arrowverse