Justice League Europe #12 was published by DC Comics on March 1, 1990, as part of a series that began in 1989. Keith Giffen and Kevin Dooley write, and art comes from Bart Sears, Bob LeRose and Gene D'Angelo. This 36-page issue features Guy Gardner, Metamorpho, Animal Man, Platinum and Mercury, among 20 characters cataloged on VerseDB.