Cassandra was called Orphan in Future State.
Honestly, I really doubt Cassandra will be the only one called Batgirl when they are together.
That would make it seem like Cassandra's the main Batgirl, but I don't think DC is going in that direction.
So far, DC is selling Cassandra and Stephanie as Batgirl pair. The only exception has been the Asian celebration, due to obvious reasons.