Here’s DC’s official description of the comic:
In this seventh of 12-issue maxiseries written by Warren Ellis with art by Bryan Hitch, there’s a lunatic on the loose and a dead body inside a supposedly impregnable home. Members of the justice system are being murdered by a secret army, and nobody knows what’s happening. Does the Batman have the single clue that’s the key to the whole nightmare?
And here are the preview pages: