I predict TNJ from Naruto to Sasuke after the War ends (or at least in the end of the war).
After all, Naruto knows the truth about how to become a Hokage... Itachi being the one who told him how to.
Well, I guess there are two posibilities...
a) Sasuke is affected by TNJ and starts from scratch to earn the title. Until then, Kakashi or Naruto takes over the title (I'm pretty convinced that Tsunade won't make it). If Kakashi becomes Hokage, Naruto and Sasuke will fight for the title in the future.
b) After the war, just few shinobis survives. In order to overwrite the current shinobi system, it is necesary to eliminate the Kage's based system, so neither Naruto nor Sasuke will earn the title. In this case, Sasuke will dedicate his days protecting the village from danger within the shadows, and Naruto will be wandering in the world as Jiraiya-sensei did. As the time passes, it's pretty sure to assume that Naruto will be known as a second Sage of Six Paths, but not talking about abilities or power, but talking about "how to comprehend, embrace and fulfill the peace" to mankind (I know that was the main objective of SO6P when he taught Ninshu). This probably could mostly happen... Sasuke could fulfill Itachi's will, and Naruto already fulfilled his most important dream... aknowledgment (the reason he wanted to be Hokage was "aknowledgment", and I guess he is mature enough to get a let down in the case of the elimination of the Kages system in order to achieve "peace", that is, his master's will).