The JLA versus the Cosmic Vampire!
The Story: "The Coming of Starbreaker!" by Mike Friedrich, Dick Dillin, and Joe Giella. Superman arrives at alien planet, as missing JLAers Flash, Green Lantern, and Hawkman are getting attacked by giant insects. It's always something...
Turns out these insects are robots, which frees Superman to use lethal force on them, wrapping up the fight by page six. GL then explains that the beam transporting them to JLA HQ was intercepted by the Zeta Beam, where they found the planet Rann under attack by a a baddie named Starbreaker!
Turns out Starbreaker uses these robot insects to move these planets into the sun(!) releasing their energy, which he collects and uses to make him more powerful, hence the "cosmic vampire" moniker.
The Starbreaker has split himself into multiple beings, and the JLAers split up. Green Lantern and Flash defeat their Starbreaker, and Superman and Hawkman do the same for theirs. They all meet up on Rann, where Adam Strange is their to meet them.
Then the Zeta Beam wears off, transporting Flash, GL, and Hawkman home. Strangely, though, the Starbreakers disappear too! We follow them "home", as well, where the original Starbreaker dissolves his duplicates, and swears revenge on the Justice League...and on Earth!
Roll Call: Superman, Flash, Green Lantern, Hawkman
Notable Moments: This issue also features two Golden Age tales, an Hourman one from Adventure Comics #48, and a Wildcat one from Sensation Comics #84, drawn by Bernie Krigstein! Wow!
I like Starbreaker as a villian--he's a classic, mustache-twirling bad guy, and after so many issues of the JLA facing more social, earth-bound threats, it's nice to see them doing what they do best--beating up bad guys bent on world domination.