WildC.A.T.s / X-Men: The Silver Age 3D

In 1997, Image's Wildstorm and Marvel joined forces for a single oversized 3-D issue that pitted Jim Lee's WildC.A.T.s against the classic X-Men. Written by Scott Lobdell and featuring Jim Lee's iconic artwork, this one-shot brought together two of the '90s most popular superhero teams for a crossover that played with the decade's 3-D gimmick. It stands as a unique artifact of the era, a direct collaboration between two powerhouse publishers at the height of the comic-book speculator boom.