Legion of Super-Heroes Vol. 4 (1989-2000) #78

Plot

An alien scourge threatens to destroy Earth's solar system by extinguishing the sun itself. With so many Legionnaires expelled, injured or missing, the remaining heroes stand virtually no chance of stopping the threat...until the United Planets forces them to recruit five of the most powerful beings in the cosmos. Too bad no one bothered to mention that the Fatal Five are evil incarnate! (mycomicshop.com)