I'm with Icemizer, although I twitch at the thought of a new Oracle, too. I just can;t be helped.
I agree that Harper Row was introduced for a reason. Maybe it looked clumsy to me after the introduction of Carlie Cooper, which was also conducted as an insistence that the reader embrace her. What I do find interesting is that the preview of Batman 18 (I think) shows Blackgate, which might mean Harper is our eyes into anothe rpart of Gotham geography. (Less interesting is the clearly-cribbed family troubles with Dad: that's just taken straight from Stephanie Brown and Cluemaster, as per Snyder's usual Bat-writing.)