Decades Before An Avengers: Doomsday Showdown, This Comic Pitted the Avengers Against the X-Men (and It Just Sold at Auction)

Weve seen Marvels two big super teams go head to head on a handful of occasions. The Avengers and the X-Men have often clashed due to differences on ideology and mutant self preservation, like in 2012s Avengers vs. X-Men series. But on a few occasions, the two teams have butted heads over a simple m