Honesty time, I wasn't quite truthful in my cover thoughts post about Batman #12, because I was unsure whether or not these plot details were public knowledge yet, but considering Snyder just posted them on Twitter, I'm going to assume it's fair game.
Harper Row. Yep. The mysterious character from Batman #7 will be the focus of Batman #12, and apparently she's going to be pretty important to Gotham in the coming stories.
So there you have it, maybe that cover makes a little more sense now, given the events of #7?
(Source: Scott Snyder's Twitter)