User blog comment:Theraven22/bankai's that should be revealed/@comment-452405-20100329101505

I'm not to sure you got the thing about "Ukitake might show off to impale his own creation Hogyoku" right as it was Urahara Kisuke that made it.

Other then that I do believe at least Shinji's bankai should be revealed as Aizen is the one who destroyed his life and it wouldn't be surprising if Shinji was to go all out on him eventually. But I don't think many bankai need to be revealed as of now because there will be another 2 story arcs after this and Tite Kubo might want to reveal the remaining bankai later.