Well, Madara can't become the Juubi's Jinchūriki.
And since Obito teleported himself away with Kakashi, the rules of every single story ever written tell us that Obito is going down.
Without Obito, Madara will need a new Jinchūriki for the Juubi.
Now what if, Sasuke comes to the battlefield, epix reunion, some fights, blah blah, etc.
And then Madara starts trying to talk Sasuke into joining him. (Since Sasuke is probably still vulnerable to hatred.)
So basically, he could tell Sasuke that he can make a world where Itachi still lives, and the Uchiha never got exterminated.
Knowing Sasuke, he might join him. Sasuke would become the Juubi's Jinchūriki, and there you already have a motive for a Naruto Vs Sasuke fight.
And since Obito teleported himself away with Kakashi, the rules of every single story ever written tell us that Obito is going down.
Without Obito, Madara will need a new Jinchūriki for the Juubi.
Now what if, Sasuke comes to the battlefield, epix reunion, some fights, blah blah, etc.
And then Madara starts trying to talk Sasuke into joining him. (Since Sasuke is probably still vulnerable to hatred.)
So basically, he could tell Sasuke that he can make a world where Itachi still lives, and the Uchiha never got exterminated.
Knowing Sasuke, he might join him. Sasuke would become the Juubi's Jinchūriki, and there you already have a motive for a Naruto Vs Sasuke fight.
