Hm, good question. Regardless of what is said, relationships in the Naruto Series are VERY important. It's all about the future, and what future generations can achive. [We've seen this with Kurenai + Asuma's child, and also with Konohamaru.] Now I don't think a Kage should actually have children or for that matter a spouce WHILST being a Kage as it could put the WHOLE village in danger if taken hostage. It's a large liability to have a child in an extreme state of power.
IF Naruto does get a spouse of "Final Love" it'll be Sakura. However I don't find myself seeing this series go in that direction, if it is Sakura we've already seen some forshadowing with Jiraiya and Tsunade.
I do find there being a chance of Naruto and Hinata however she doesn't play a large role in the series but there is definatly something going on there. I doubt a Hyuuga would be allowed to be with someone of lesser value to the clan, so it'd most likely be IF Naruto becomes Hokage and only then will it be in the clan's best interest