So there's two things I want to talk about. First Kishimoto mentioned Madara has no weaknesses, but that doesn't makes sense, everything has a weakness according to Itachi. We've seen that Edo Tensei resurrects can be swayed into moving on to the afterlife after their regrets are eased, much like exorcising a ghost. Sasori and Sai's brother's Edo Tensei was undone this way which forced Kabuto to keep the other Edo Tensei ninja fully controlled using Orochimaru's Chakra. But Kabuto is no more to strenghten his control over a Edo Tensei body, so Madara's free. This is Madara's weakness, but what or who could possibly sway Madara into moving on to the after life...? And then we have one of the strongest jutsu in the Naruto world only second to Plot no Jutsu: Talk no Jutsu. But every jutsu has a weakness! What could that be? Do you guys see it? Talk no Jutsu and Madara are eachother's weaknesses! I forgot who said this in another thread but because unlike the other shinobi who "became" evil from some sob event that happened to them and made them sought for peace, Madara has always sought for power, he didn't become evil, he was always evil. And he's got a pretty sharp tongue and top tier trash talking that made Oonoki the kind of kage he was until recently. He could make you eat your own TnJ. And yet at the same a strong and well delivered TnJ is the only thing that could make Madara's spirit to move on and undo the Edo Tensei. Effectively defeating him. The strongest Spear vs the strongest Shield. Which one will win? tl;dr Itachi is in this thread.