Listen Kubo, we've all seen this shit before. You cliffhang the Quincy taking what you want us to assume is a fatal blow, only next time he comes back in some other stronger form and then you waste several chapters until somebody pulls out a bankai/special ability that is exactly the weakness of the Quincy.
Aizen ain't using his bankai right now, but he will in another chapter or two against the TRUE FINAL FORM of this waste of a villain.