User blog comment:Xilinoc/Ch. 567 (Rukia be like "I ain't even scared though")/@comment-8669536-20140205110610/@comment-11051098-20140205144657

I think the most likely option is that Rukia's new or "complete" power is a result of Ichibei's training. Renji got the real name of his Bankai from Ichibei, and they both trained in his palace.

I don't know, but I doubt it's over already. It's too soon, I expect Äs to go Vollständig in the next chapter and put up a decent fight.