I don't know, I find this whole Unohana/Kenpachi story lame. I wished Kubo had used Unohana in a battle with a sternritter, or even Juha Bach. We should see her in a long fight, and using all of her abilities(Kidou, Shikai, Bankai, Sword Mastery) in a fight. Then even if she lost, it wouldn't feel so much like a cheap death. I think Unohana will die, it seems fitting if she does, as the two bloodthirsty captains from 1000 years ago would finally be extinct. Losing their best healer would certainly cripple the SS as well( unless kirinji or w/e his name is helps Byakuya master kidou LOL).