I'm trying to be optimistic here... and maybe a little lacking in the logic department.
I'm hoping for Cass!Nightwing. Drawing comparison between Cassandra now and Dick when he outgrew the Robin mantle, I pray this will lead to character development for Cass.
The Batgirl title will, like what a few of us have said umpteen times, be 'Batgirls'. With Cass!Nightwing, Steph!Batgirl and Babs.