Well now that I thought about it.
Earlier in the manga Madara made a black side of zetsu and told obito that to think of it as being a part of me(chapter 606 page #18). Then in the chapter 637 page #15 obito had a black side of him which exactly look like black zetsu.
Could it be that Madara is...
Sense the fight with Madara is basically over...
We have a new battle with everyone facing obito.
Does anyone think that someone else will die or will everyone come out and naruto becomes hokage?
I think people are forgetting what sasuke might do after everything is over.