User blog comment:Xilinoc/Ch. 572 (inb4 "Kenpachi doesn't have Shikai")/@comment-1351982-20140312125723

I have a feeling they're not dead. Again, I could be wrong, but I think if they were to die, the other visoreds within and out of the Soul Society would be there or at the very least Shuhei and Mashiro. Plus the fact that Isane is there makes me a little more skeptical. If anyone could revive them at time point, she's the best person available right now.