Sasuke is strong but lets face it, he can't hold a candle to Madara. Maybe if he possibly gets a powerup but until then he can't touch him. BM Naruto is closer but even I don't think he could do it. Kishi has backed himself into a corner by making Madara so OP and Tsunade and the other Kages will win by plot no jutsu to prove the point of the alliance and to balance out the plot no jutsu that kept Madara here in the first place. If not that, then only scenario I see is the very unlikely one of Naruto and Sasuke working together which seems unrealistic to me.
By the way, you should stop calling a fictional character Lord, you don't see anyone else's fanboys calling their favourite character Lord, even if they go over the top in different ways, you my friend, are weird.