If Obito is still alive what do you think he will be like? How strong will be? What are his Jutsu? Who will be his students? Also, what will Kakashi be like?
Remember the room where Tobi transplant Itachi's Sharingan to Sasuke; the background is full of Sharingans. How did Tobi get those? I think Tobi has something to do with the killing of the Uchiha Clan. I believe that Tobi left out some important information when he is telling Sasuke about...