The only Kage that I don't want to die is Gaara, but honestly they all might be screwed.
If that happens, I really hope Edo madara sticks around for a while as a main/last antagonist, but it would highlight the senselessness of war.
Still, An unbound Edo Madara walking around with the 5 kages bound to the Rinnegan would be pretty nasty, and would serve a plot point to show that Edo Madara is a beast.
As for the original kids from Konoha, I don't think any of them are going to be killed at this point. Which.... that sort of disapoints me.
- Choji should be dead (he wrestled with Gedo Mazo, the soul stealing god statue which is likely to be the new body for the Juubi.), and his secret technique was lame. As a character he peaked back when Sasuke left for Orochimaru.
- Shikamaru could make it through the war in one piece, but showing him getting severely wounded would show that even brains doesn't completely negate the brutality of war. Plus... scars look cool.
- It doesn't matter if Ino lives or not. I tend to favor her living on, because her dying wouldn't even make a difference one way or another.
- Shino is kind of the same way as Ino. He's very much a minor side character. His bug abilities aren't even necessarily the height of his family's abilities. If he dies, great. If he lives Great. i don't think it'll matter if he gets maimed, so as a character it's death or nothing at all.
- Neji could live. Maybe get severely injured. He only needs one eye to use his hyuuga abilities and take over the hyuuga clan head position. Honestly anything goes with this one.
- Ten Ten... is in the Shino/Ino category. So minor only her death would matter, so if she lives, Great. If she dies, great. Otherwise, i don't care.
- Kiba actually needs to live. His douchbagery is pretty rampant and allowing him to live would drive home the point of the senselessness of war. maybe just injure Akamaru, and that'd be enough to make Kiba tragic.
- This depresses me to no end... Rock Lee should die. He should be a hero, but he should die. Hard work is great, but, shit happens.
- Sai... i don't know bout him living or dying; he's important enough he could be maimed.
- Hinata should live, but with some sort of disability. Maybe she gives up her eyes to Neji, and just lives on for Naruto.
Sakura, Sasuke, and Naruto will live on past the war. I don't believe the final conflict of the series is going to take place during the war, but just after it, and all three of these characters are likely to be present.