What If? #7 (Marvel, 1989)

This full-body image of Wolverine as an agent of S.H.I.E.L.D. is instantly recognizable as the work of Rob Liefeld -- but he's not the only Image Comics founder involved in its creation, as Jim Valentino handled the layouts, with Scott Williams bringing his signature precision to the inks. Uatu the Watcher looms large in the background of the piece, explaining the endless possibilities of the Marvel multiverse -- a concept that has become increasingly familiar to fans as the Marvel Cinematic Universe's Multiverse Saga is now well underway.