Idea!
Ok, so this looks like Steph. I just won't accept that they are doing this with Barb. So maybe the book is a setup where Barbara is the old Bruce to Stephanie's Terry if you understand the Batman Beyond reference.
Despite my love for Cassandra I would love this comic. Hell, it would still be entertaining if it was Cassandra being put through the paces by Barbara.
Hell, what if its like the cartoon movie Mystery of the Batwoman and both the young ones are Batgirl to give the impression that shes ubiquitous?!?!