I joked about this a long time ago as all part of Aizen's master plan. Let the quincies and the shinigami fight it out and then when the dust settles mop up everyone who is left and assault the soul king!
Could still happen....maybe
EDIT: I am really disliking this Jwach (however his name is spelled) guy. His powers are stupid and unbelievably unfair. I mean at least Aizen's were logically explained. He placed everyone under his sword's power the moment he displayed his shikai to the gotei 13 which gave him a huge advantage against everyone.
Jwach or whatever just suddenly has the ability to not die whenever he is pressed.
Captain Commander Yamamoto? Not the real dude
Assualting 0 Squad? Suddenly can just take all the quincies' power and riatsu to make himself stronger
Fighting the 0 Squad leader? Suddenly he wasn't really seeing and has the ability to see things as they are which somehow keeps him from getting killed?
