Brainiac travels back in time from the year 2979 to destroy a young Clark Kent before he can become Superman. The Legion of Superheroes, however, send three of their own to stop him: Saturn Girl, Cosmic Boy, and Chameleon Boy.

Superman stumbles across a world ruled by Phantom Zone criminals and tyrants Jax-Ur and Mala.

Superman teams up with Kyle Rayner the new Green Lantern in order to stop Sinestro.