People who are saying they would be upset if Edo Itachi, Edo Madara or Tobi die, then get a grip. Edo Madara and Edo Itachi are dead and will be re-sealed if Kabuto doesn't release the Technique first and Tobi is the final villain of the series, he is going to die.
Uchiha fan boys, please leave. ^.^
OT: I would be upset if Naruto, Sasuke or Sakura died. i want them to be re-united at a team.
I would also be upset if Kakashi or Tsunade die, because i like both of them but i think that atleast one of them will. (Most likely Tsunade). To further Naruto's pain and his resolve to over come his pain with forgiveness and love.
Two cents.