Legion of Super-Heroes in the 31st Century — DC Comics
Issue: #10
An ancient legacy catches up with Brainiac 5 when he learns the terrible secret of his great-great-grandfather, Brainiac 1...one of Superman's greatest enemies! To make it up to Superman, Brainy takes him on a trip to his home planet's past - but an unexpected detour to the Phantom Zone could mean disaster!
Creators: Matthew K. Manning, Heroic Age, Jeanine Schaefer, Jeff Albrecht, Sal Cipriano
Characters: Superman, Bouncing Boy, Brainiac 5, Cosmic Boy, Lightning Lad, Brainiac, Saturn Girl, Tharok, Emerald Empress, Mano, Validus, Persuader