The two-part 'Mash-Up' begins here! Something is amiss in Gothamopolis and it's up to the Justice Titans to save the day! What exactly are Gothamopolis and the Justice Titans? That's precisely what Superman and Batman are trying to find out!

Written By: Michael Green Mike Johnson Pencils: Francis Manapul Inks: Francis Manapul Cover By: Brian Buccellato Francis Manapul