I agree with most of the theories here, they sound amazing. Atm i still think naruto is full with massive potential even at his current level. He's like a genin compared to what he can become ( I don't literally think he's genin level).
I think it's really likely that he'll keave konoha:
a. He will be forced to elave by danzou as a deal to spare the lives of everyone in konoha.
b. He will choose to leave as it is not safe for konoha if he remains at the village, hence the moral he has of protecting everyone.
c. ( One of my fav's - someone said it already) He leaves, deciding to train with the kyuubi as it is is too dangerous to be in konoha. Plus he may go on a journey for several years (like a time-skip, where akatsuki regains power due to the losses), gaining knowledge, influence, wisdom, friends and kick-ass jutsu.
On top of that, he can also master more elements, learn frog technuiqes, taijutsu, genjutsu, ninjustu and create more kinjutsu, and discover some other unordinary tech like the death reaper seal. Become adept with weapons and all the all-round ninja tech. By the time he'd be done, he'd be the most unsurpassaable hokage and most feared on the battle-field, surely becoming what one would accept by the son of the greatest hero. I know that this is all pretty farfetched, but 1one can only dream.
Or he could just stay the No.1 knucklehead ninja out there with with a major rep.