<p>Ok, so Sasuke gains the Yin Power from Hagaromo, adding on to his Dojutsu arsenal. He now has a Eternal Mangekyo and a Choku-Tomoe Rinnegan.
</p><p>Madara is the Ten-Tails Jinchuriki and absorbs the God Tree. At any moment, he could activate Infinite Tsukiyomi if he wanted to.
</p><p>Ignore Naruto, like he wasn't there in the battle. Say Sasuke had to fight Madara like that. Who would win?
</p>
<p>If plot armor is removed Madara bodies even if Naruto was present and helping as well he excels in everything power,dojutsu,combat experience...so yeah..
</p>