it cant be 1st hokage senju hashirama 1st was already sealed in fuujin or deathgod seal by sandaime or sarutobi in former episodes during orochimarus plot to destroy konoha i think its rikudou sennin which orochimaru cant transfer his body theres a chance for 2 person either tobirama or izuna uchiha which has a rare sharingan like KOTO on itachis fight with naruto on manga
Kabuto said "quite the vessel you have" so that means tobi is madara but like orochimaru he transfer his soul into other peoples bodies to live longer and madara original body is is coffin and thats what kabuto is gonna keep a secret
@IAmSasuke2 "There's only One Madara dumbass, and he's standing right in-front of the coffin."
Kid STFU,theres no need for you to be a prick. But its' a theory ,so calm down.. I say it could be Madara (I like to come up with theorys. Why was Madara so shocked when he saw the coffin? Even if it was his brother (like most people are saying) he wont be in shock... And whats up with kabato saying don't worry i keep it a secret
i finally figured out whos really in the coffin that kabuto summoned and its not madara so the only person left would be his little brother thats why he had that shocking look in his eyes, now we all know that hes immortal and all that but he cant do the justu that orochimaru does every 3 years and plus he took his little bros eyes to become perfect
My theory is that the final shinobi Kabuto is the real Madara it fits why would he be so shocked by it and it would give Kabuto a lot of power over Tobi .As for Tobi i bet it's Madara's little brother because he said that the hidden leaf killed his brother and most likely wants revenge .