These shocking scenarios would be insane to see on the big screen! For this list, well be looking at the most bizarre and outlandish alternate universe stories about Marvel characters that appeared in this long-running comic series. Our countdown includes What If Thanos Joined the Avengers?, What If: Spider-Man Versus Wolverine, What If Iron Man Was Trapped in the Time of King Arthur?, and more! What do you think is the craziest What If?storyline? Let us know in the comments below.

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