Chances of dying:
-Tsuchikage: Somewhat high, but who knows. I thought he'd die for sure against Madara but he keeps on surviving no matter what, so maybe the old man will make it.
-Tsunade: Low. At first I thought she might die, but Dan just told her it's not her time yet. Plus I'm pretty sure she'll live to make Naruto hokage. So she survives, but she may have to retire after this fight.
-Raikage: Medium. I mean Kishi COULD kill him off, but I don't really see why. Plus I don't know who from his village would take his spot.
-Mizukage (Mei): Low. Kishi doesn't kill off young characters too much, especially younger women. Plus we don't have much backstory on her, so her death wouldn't have much impact.
-Gaara: Very low. Too young, he's part of Naruto's generation. Plus he already died when Akatsuki captured him, it would be redundant to have him die again.
-Killerbee: Medium. I thought there was a good chance he would be captured, but since Tobi figured out a way to summon the Juubi without him, he might be safe.
-Kakashi: Low. He already died against Pain, if Kishi wanted him dead he would've let him stay dead.
-Gai: Not important enough.
Konoha rookies: Low. Sasuke promised Naruto he wouldn't kill any of them. He might beat them up tho.