Justice League Europe #15

The cover of Justice League Europe #15 (June 1990) makes an immediate, striking impression: a menacing group called the Extremists charges forward out of a ruined cityscape, their sheer variety — a caped sorcerous figure, a hulking tentacled brute, a blue-winged creature, a fiery lion-maned villain, a flaming energy being, and more — conveying a genuine sense of overwhelming threat. The cover's tagline says it all: they've already destroyed one world, and now they're coming for ours. Penciled by Bart Sears and inked by Joe Rubinstein, the composition crackles with kinetic energy and sets up "The Extremist Vector" as exactly the kind of high-stakes opening chapter you'd want from the Keith Giffen and Gerard Jones creative team.