Guardians of the Galaxy #6

The 31st century's Guardians of the Galaxy face a dire moment on this November 1990 cover by Jim Valentino and Joe Rubinstein — a menacing blue-skinned figure triumphantly hoists a familiar red-and-white shield overhead while several Guardians lie defeated at their feet, with one crying out a desperate "No!" The cover boldly announces the "unparalleled villainy of Force," promising a confrontation with real stakes for Marvel's future-set team. It's a gripping, high-tension image that makes the title's tagline — "Explore the Marvel Universe of the 31st Century" — feel like both a promise and a warning.