I always got the impression that Aizen made him explode or something.....
As for Kira.....after what happened, anything is possible I guess. This is the same mangaka who's had people chopped in half, have had everything in their chests and ripped arms and still survived....
Anyway...I"m guessing we'll either get the conclusion of Uno and Kenny...or whatever's going on with Ichigo, Renji and the Zanpakuto Ho Harem with A Pimp Named Slickback.