I'm assuming the explosion in the sky is Ichigo bursting out, flanked by Urahara and whoever was blading Urahara a couple chapters ago (Obviously it's Grimmjow)

Ichigo will reveal his quincy powers, then combine all the powers he has so he has ALLLLLLLL the spiritual pressures. He can then spam Mugetsu all he wants with no consequences.

And that's the end of the quincy army. They call in Orihime to reveal her super special technique she's been working on: Mass time rejection. She covers the entire soul society and fixes every problem they've ever had, including erasing the quincy from time. Everybody lives happily ever after, and Bleach is over.