Invasion!

Published in 1988-1989 by DC Comics, 'Invasion!' was a major crossover event written by Keith Giffen and Bill Mantlo, with art by Todd McFarlane, Bart Sears, and others. The storyline revolves around an alien alliance known as the Dominators, who perceive Earth's metahumans as a threat to the universe. They form a coalition with other alien races, including the Khunds, Thanagarians, and Daxamites, to invade Earth. The event is notable for its impact on the DC Universe, particularly the introduction of the 'metagene' concept, which explains the source of many characters' powers. Key characters involved in the storyline include Superman, Batman, Wonder Woman, and the Justice League, as well as various other heroes and villains from the DC Universe. The series was comprised of three main issues, with numerous tie-ins across different titles. 'Invasion!' had lasting effects on the DC Universe, influencing subsequent storylines and character developments. It was well-received for its ambitious scope and the way it integrated multiple characters and series into a cohesive narrative.