Quote from kazesages
Man i fear naruto is coming to an end D=
Doubt it. Kishimoto will keep that gravy train running for as long as humanly possible. Realistically speaking, the chances of him writing another series as successful as Naruto are pretty low. (The success of this manga is just too huge.)
And if he doesn't want to keep going with it, Jump will put a gun to his head (metaphorically speaking) the way they did with Toriyama and Togashi. Togashi was tired of YuYu Hakusho by the end and wanted to quit, but Jump made him keep going. Toriyama was done with Dragonball after Freeza, but Jump forced the Cell saga, so he killed off Goku to wash his hands of it, but Jump wanted another, so he made the Buu saga which basically made fun of his whole series. (No wonder the man has no interest in getting involved in another long-running shounen series.) Eyeshield 21 also had an extra saga forced onto it by Jump.
This manga has a few more years left in it at the very least.