I look at 90% of these comments and wonder how a vast majority of you people can be so utterly fucking stupid, holy shit you people are dumb rofl especially the people saying Madara would win because he has the sharingan...you have to be dense not to know that to be effected by the sharingan you actually have to have a chakra flow (it's like you kids can't even read or understand the anime you oh so love)...Aizen and everyone else in the realm of bleach have Reiatsu so sharingan obviously wouldn't effect the brain since there wouldn't be any chakra flow within Aizen...it's the same argument over and over with you kids and as for the final statement, First off Madara is a physical being even in edo form...it's like you people think Aizen would be fighting in a gigai or something, Aizen is a spirit, madara even with the rinnegan would not be able to even sense Aizen or touch him.. because once again Aizen does not have chakra..hell, Naruto in sage form wouldn't even be able to sense Aizen because as a spirit he has no natural energy to sense, Aizens Reiatsu releases at maximum power would bring Madara to his knees and slowly deteriorate him as Aizen would sit unchallenged on his throne watching him like a god watches a world crumble over time and I'll end this by saying, if you aren't smart enough to comprehend attributes within the realm of an anime you're bring up in an argument then don't watch the show/shows you're making yourself look even more dumb than you already and with that i bid you and any unsophisticated arguments you belligerent otakus have adieu.