this is a breakdown of who would win : 1-madara allready lost when he looked at aizen's direction, cuz aizen has no genjutsu ,, he manipulates all senses cobined and not just by eye contact ,, read the manga to find out how he manipulated ywach.. 2-if aizen releases his riatsu ,, madara will fall 3-aizen does not need to evolve to defeat madara ,,, he can do it in base form ,, 4-any soul reaper strong enough can resist the sharingan's genjutsu and see the limbo ,, cuz the shininggami can see using the riatsu alone,,,, and the riatsu can cancel the genjutsu done by sharingan unlike kyoka suigetsu 5_the sharingan only effects the chakra of nerves in the brain to make genjutsu ,, meanwhile kyoka suigetsu is nothing close to genjutsu ,, it is the full complete hypnosis by controlling the 5 senses ,,, even if u know u under hypnosis u cant get out from it ,,, the only way is to touch aizen's sword ,, well ,, he ain gonna let u cuz he fast af,,,,, 6_aizen riatsu is so high he can bring down the soul palace wich is hundreds of thousands of miles away ,,, and the truth seeking orbs cancell reanimation jutsu ,, not the regeneration ,, so aizen will still regenerate even after getting hit with them ,,, 7_madara will never escape kyoka suigetsu effect ,, even if he know he is under it !! he simply cannot ,, sharingan can cancell genjutu ,, kyoka suigetsu is not a genjutsu ,, its a complete manipulation of 5 senses ,,and the energy ,, so he can even manipulate the chakra of the guy under its effect !!! 8_aizen will still grow and evolve cuz of the hogyoku ,,, untill he becomes at the level of soul king 9- bro its aizen clapping madara and the verse