Ugh, Rangiku... I hate it when weak Shinigami try to talk their way-more-powerful friends out of being evil >< It just ends up taking
forever, and amounts to nothing but a literal bloody mess...
Also, notice some parallels between Aizen and Toussen after Toussen hollowfied in his fight against Komamura - Toussen wasn't being careful. With his new vision, he was only focussing on what he saw, and thought that he was so powerful that he didn't have to pay attention to his other senses. It's very similar with Aizen, who now has so much power that he's not even avoiding the attacks of Urahara and co. I predict that will be Aizen's eventual downfall, just like how it was Toussen's downfall.
Aizen will probably get up from the Getsuga Tenshou, say something snappily jerkish, and go into a higher power level of some sort, at which point Urahara and Isshin will probably go Bankai, perhaps at the chapter's very end. I REALLY want to see their Bankais!

Isshin's will probably be similar to Ichigo's.