As much as I'm dieing to see how the story ends, I for one, hope it lasts as long as possible!
You never know, kishi can have a lot of tricks up his sleeve as far as how this story can turn out. For example, sometimes wars last for a long time, not just a few days. So tobi and kabuto and sasuke might retreat and re-strategize. Naruto can go off somewhere for a final training with Kurama. Bee might die (which I would hate to see, but jussayin..) Tsunade might die (which I kinda hope madara takes care of. Lol) sasuke might attack konoha while naruto's off training somewhere and actually do some damage. Then naruto might end up showing up in the nick of time.
There are also other small villages out there, kishi can always bring in new characters if he ever wants to keep this story going...
What I'm saying is, the possibilities are endless. And I hope this manga/anime continues for a few more years at least. (As long as Naruto becomes hokage and as long as sasuke dies at some point I'll be happy! Lol)