Yeah, I'm guaranteeing that Hitsugaya, Komamura and Soi Fon's Bankai's all come out. Tousen is a possibility, but only if Komamura pushes him too far (we know they're going to face off). Gin is possibly being held in reserve, the only one really there for him to fight would be a Bankai battle between him and Ukitake (prediction) which could possibly lead to Ukitake's death and actually freak a lot of people out.
Shunsui I don't expect, same with Yama. Aizen definitely not.