"Under the Penguin's orders, Killer Croc, Cheetah, Silverback, and Man-Bat have been causing chaos with the help of robotic Cyber Animals ... and Batman is determined to stop them. But what's one hero against an entire zooful of villains? To beat the criminals back, Batman teams up with the Flash, Red Robin, Nightwing, and Green Arrow. Can Batman and his fellow heroes stop the Penguin's diabolical plans before they finish Gotham City for good?"--Jacket flap.