User blog comment:Xilinoc/Ch. 594 (something something ech)/@comment-24551814-20140828161533/@comment-26420452-20140828162346

Giselle and Mayuri stated that Hitsugaya is still alive. I think we've got a subtle hint that all the other three are alive. Funny how Giselle took her time to dress up only Hitsugaya.

As for Isane and Yachiru, yeah, it's very probable.