Legion of Super-Heroes in the 31st Century (2007) #9

Written by Scott Beatty Cover by Alexander Serra Art by Sanford Greene & Nathan Massengill

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 him, Brainy takes him on a trip to his home planet's past, but an unexpected detour to the Phantom Zone could mean disaster for the Legion's future!