Board Thread:General Discussion/@comment-31283382-20140525210606/@comment-893506-20140525212420

Nnoitra and Starrk are dead, Grimmjow is alive, and Harribel is captured by the Wandenreich.

Nothing was presented or answered regarding if Izuru is alive or not, so nobody can properly answer that question. Officially, Yoruichi's absence is never explained, but in an interview, Kubo stated he was having trouble deciding on a design change on her.

Isane's Shikai form has been seen, but that's as far as it goes, as Ichigo knocked her out seconds before she reacted the only time it was released. It's unknown if Tetsuzaemon's Shikai has any abilities either.

Everything else is the way it is because there has been no information given (either in-story, in a databook, or in an interview) to disclose any real information, so everything else is beyond answering at this time.