Ok so, I'm a really huge Naruto fan I have watched it since i was in grade 7, I am now 20 years old almost 21. I could swear Tobi was Madara but..... SPOILER ALERT!!  Its actually Obito, Madara Actaully saved him and sewed on half of an artificial body like Zetsu or whatever his name is. I almost died when I read this chapter http://mangafox.me/manga/naruto/v62/c600/1.html  in the Manga. He was there in the first ninja war and watched Rin die and only reveals himself in the second ninja war but fights Kakashi and them in earlier chapters and Kakashi only figured out it was him when he did this jutsu. Another fact I found out or rather read is that Orochimaru is actually alive and comes out during the second ninja war as well because sasuke wants help with something i wont go into much detail because i don't remember i was too excited about the madara / obito thing And Sasuke knows the truth about why Itachi kills his whole clan and only Madara and Obito got away because they were supposed to be already dead and are hiding out.