This is it. Scott Snyder has been building to this, the climax of his arc involving the true sadistic nature of Commissioner Gordon's murderous son, James Gordon Jr. The truth is out, and James is facing down his sister Barbara, who was the only one to know all along, without a shadow of a doubt, what the truth of her brother really was.
This week, we see how Barbara, Jim and Batman will deal with this revelation being exposed in the last issue of Detective Comics before it gets its first-ever renumbering in DC's New 52.
Check out these preview pages for Detective Comics #881, due out this week from Snyder, Jock, and Francesco Francavilla.