Batman: Battle for the Cowl: The Underground (2009-) #1

With Batman gone, the villains have descended on Gotham! A who's who of Bat-villains star, including Catwoman, the Riddler, Harley Quinn, Two-Face, Poison Ivy, the Penguin and Ra's al Ghul. What kind of havoc will these villains wreak on a city that's already on the verge of implosion?