After examing the scans from OXM, im guessing that so far Batman's team consists of Cyborg, Nighwing, and Raven. But thats not all in the playstation magazine it said that Green Arrow and Green Lantern were fighting each other. So they will be on opposing sides.
Also, in the section about the super moves, it states that Bane breaks his opponen's back over his knee. Although that was a given, its nice to see some confirmation.
So im guessing that the mystery person behind Bane got his back broken.