User blog comment:AldenHeathcliffe/Chapter 551: The Burnt Offerings/@comment-2211792-20131002150708/@comment-11051098-20131002224522

If it was just as easy as that, there would be no point for the Sternritters to steal Bankais in the first place. But Urahara might have been able to invent some sort of spell that if it hits the one the Bankai was stolen from, lets him/her do that - absorb and reclaim it, and use it like it was never stolen.

But personally I feel that another captain will show up to save Hitsugaya from Cang Du's finishing blow, before something related to Bankai-restoring happens.