Avengers: Doomsday Needs To Solve The MCU’s Tony Stark Replacement Problem

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Although Avengers: Doomsday won't be lacking a heavy presence from Robert Downey Jr., it will presumably be without Tony Stark, which presents a massive challenge for the upcoming film. Tony Stark was never the easiest Avenger to rally around, but he was usually the one who pushed the team forward. His ego created friction, but his quick thinking and willingness to put himself on the line could also force the Avengers to act.
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7 Years After Endgame, Avengers: Doomsday Still Hasn’t Solved Its Biggest Hero Problem

Doomsday still needs someone to replace Tony Stark

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