I hate the New 52, but this is actually something I'll be checking out. Batman 28 was a good preview, and if Harper and Steph are prevalent (even if Steph's history has been retconned--sigh), it could be the thing that makes me buy some DC comics again for the first time in a year.
This is a great picture. For once, n52 designs aren't terrible, and you capture them well! I love how Steph's costume is a combination of her Spoiler and Batgirl pre-n52 designs.