[Zek]

Spoiler for Manga:

I think it will be Naruto, provided he can get his Kyuubi situation worked out. Really the deciding factor is how long Tsunade holds the job. I think she'll be there a while longer, in which case my prediction is that Naruto will be Kage level by the time she dies(considering that Gaara already is). Kakashi is the next best candidate, but he doesn't seem the type to accept the job and I don't think his abilities are well suited to defend the village either, because of his stamina problem. We also already know that Tsunade supports Naruto in his dream, and she would obviously pick him if he's qualified. The council could support it because Naruto being bound to the village as Hokage would keep him out of trouble - same as the Sand did with Gaara.