Morrison's JLA VS The Annihilators

• Pre New 52, 616
• Random encounter
• In Character
• Takes place on an indestructible planet
• Win by any means except bfr
• Start 500 ft apart

The Annihilators have way more raw power but Morrison's JLA has the best teamwork of any superhero team in all of comic book fiction.

I'll let someone else decide.