8. Godzilla Fought The Avengers
For a couple years in the late 70s, Marvel Comics acquired the rights to Godzilla, to which they immediately began pitting him against an assortment of heroes and original monsters. Throughout this short-lived but popular 24-issue run, S.H.I.E.L.D. is tasked with containing his destruction. As you can imagine, this meant many encounters between Godzilla and a multitude of Marvels heroes, including the Fantastic Four, the Champions, Devil Dinosaur and Moon-Boy, and of course the Avengers themselves. The Avengers put up a valiant fight, but only end up driving him away, after which Spider-Man makes a cameo appearance just in time to take his picture for the Daily Bugle.