QuackVader
I have a theory! During the captains' meeting in which Itachi said he could find the culprit if Yamamoto gave permission, and he did, Itachi used his Bankai, Infinite Tsukuyomi. They are all in an illusion of Itachi simulating real life, with the ability to change temporal perception, he can simulate the entire story of Bleach and when Aizen reveals himself to be the culprit and everything is clarified he can simply say Madara:'Yeah time to wake up...Gotei 13...'. And then all the captains will wake up still sitting in the meeting room having spent decades inside Itachi's illusion, everyone takes a second to reason and immediately attacks Aizen, who manages to escape and the plot continues like this. It would be cool =)