JASON TODD. TIM DRAKE. DOUBLE TROUBLE FOR BATMAN! All-star creators Joshua Williamson and Dan Mora deliver the next pulse-pounding chapter of Batman's journey during DC K.O., giving us the Dark Knight's greatest challenge yet. Jason Todd is Batman. Tim Drake is Batman. And to complete his mission, Bruce Wayne will have to fight both of them. The former Robins aren't giving up without a fight, and it will take everything Batman has--and then some--in order to defeat them. Does Batman have what it takes to defeat both of his pupils, or have the students become the masters?