Gotham City is full of surprises, and as El Diablo delves deeper into the mystery surrounding Checkmate's agenda, he learns there are villains in town who aim to shut him up for good. But when the villains of Gotham City show up, their most infamous protector won't be far behind. Plus, Croc finds himself in an underground laboratory filled with monsters, with no way out and no way to contact Amanda Waller. But who's the real monster in this equation? He may need more than just his brawn to keep the biggest and baddest of the island's mutated beasts from destroying the world!