Spider-Man and the X-Men #1

Meet the Jean Grey Academy's new guidance counselor: Spider-Man! What's a non-mutant doing at a school for mutants? What secret suspicion has fueled the formation of his special student class? And because you demanded it! Sauron and Stegron the Dinosaur Man! The villain team 65 million years in the making! You didn't demand it? Well somebody did.