Chouji and Kiba are the only charecters that can die now without annoying too many fans (as if those two even have fans..) Shikamaru won't die, since he's a damn chunin and he's the best at running away. Sasuke can't die before the Itachi arc, Neji can't die now that he's realized that there is no such thing as destiney, and Naruto can't die until Naruto Z.

which leaves chouji, who took the pills accepting his fate to die for his friends, and Kiba, who gave up on his fighting will, and is up against the strongest foe beside Kimimaru. not to mention that his back up is none other than Kankaru, who lost in the most shameful way of all three sand shinobies.