Madara and Tobi-Different but the Same
So I know there have been countless theories on who Madara is and what he is. Just bare with me on this one because I actually have a new theory.
I think Madara and Tobi are two different 'things' but still the same person. I think that Madara is the one behind it all, pulling all of the strings. But I think Tobi is just a Zetsu Clone of Madara. (Yes, I know that has been posted before, but I have a little more evidence now.) Everyone knows that when we first saw Tobi during the fights of Deidara vs. Sasuke and Tobi vs. the Leaf Ninja, he acted, well, goofy. Now recall how the white zetsu talks. He acts like he knows nothing, and yet he has all of these amazing powers that makes him practically unstoppable. I think that this Tobi that we first saw, the goofy one who has a sharingan is a white zetsu clone of Madara.
Okay, so let's say that's true. Why does Tobi change attitudes later on? Could it be that he is a black zetsu clone now? That would explain why during the Konan vs. Tobi fight, he was dead serious and it looked as though there was black around his sharingan eye. But why would Madara change clones? I think maybe the black zetsu has more powers than we know of right now. Remember when Tobi fought Danzo's assistants, his arm was cut off, but it seemed to grow back quite quickly didn't it? So could the black zetsu be able to regenerate limbs? There are probably other advancements to the black zetsu. That could also be why Madara is upgrading the black zetsu clone so much...he is getting it ready for war.
It seemed as though he switched the clones right after people starting believing he was Madara. He wants people to think that the zetsu clone is him. That way, if Tobi is killed, Madara can go back into the shadows and finish his plan. By then, he can hope to have all the jinchuuriki and make everyone believe he is dead. He's faked his death before, so why shouldn't he do it again?
Well, that's the theory, so please comment and discuss!