I'm sure many of your have heard about this theory regarding Hashirama's lil brother, Itama in the midst of speculation that he could possibly be Zetsu. There are many clues peggin him being the younger brother, one of which is quite obvious as his hair in split in the middle. One side being white and the other black. HMMMMMMM. I know what you're thinking it's just a combo of Hashi and Tobirama's hair but if we know Kisimoto, he doesn't created character out of the blue for nothing. I have a firm belief that Kisi brought him up to be used in the storyline somewhere in the future. Yeah, I understand it's just hair, but remember when everybody was tagging Tobi to be Obito solely for the coincidence in their names and hair. What if this is anther clue? How do we know Itama is actually dead?...Think about it. Oh yeah. tsunade is Naruto's grandmother.