Batman / Superman: World's Finest #23

SUPERMAN AND BATMAN MUST STOP BOY THUNDER FROM BECOMING MAGOG! The walls are closing in on the World's Finest duo as Boy Thunder falls fully under the thrall of Gog in the universe of Kingdom Come! Superman and Batman race against the clock not only to keep Boy Thunder from becoming Magog—but to save the Multiverse itself!

Characters: Ace the Bat-Hound, Aquaman, Barbara Gordon, Batman, Batman (Kingdom Come), Blue Beetle (Kord), Booster Gold, Captain Atom, Captain Marvel (DC), Cyborg, Darkseid, Firestorm (Raymond), Flash (Barry Allen), Gog, Green Lantern (Scott), Hawkman, Joker, Magog, Metamorpho, Raven, Supergirl (Kara Zor-El), Superman, Superman (Kingdom Come), Wally West, Wonder Woman (Kingdom Come)