I see either Yamato or Sai dieing. These characters don't really have a reason to stay in the manga.
Danzo died, so there's no reason for Sai to be there to be a spy nor any doings.
Yamato is useless, cause Naruto allready learned how to control the Kyubii, so we don't really need his KG.
As for the other characters Kakashi, Sakura, Naruto, and Sasuke are one of the main characters.
Sakura can't die, because it will screw up Naruto's emotions, and he will go insane, and can really see that (if Sasuke killed her) that Sasuke will die, cause he wants to revenge, or maybe I'm wrong.
I'm not really sure about Kakashi =/ Naruto needs someone to give him some ideas

and Kakashi is a good one there. I'm like 30% that Kakashi should die.
Naruto is one of the main character, I mean come on the manga's name is Naruto 0_0
Sasuke is one of the main villains, so he could only die at the end, near the end of the manga.