Well, I think Kishi has to create another character for Sasuke if he's gonna end up with anyone at all. Remember back at the very beginning when he said his ambition was to kill Itachi and also to revive his clan? Well his clan is not going to be revived unless he gets kids. And I'm sure he'll want the Sharingan passed on too. Odd thing I found was, both his parents were Uchihas. His mother was definitely an Uchiha judging by her looks and all, so it's not just a I-got-married-so-I-changed-my-name thing. As well, Narutopedia says there's this middle aged couple Sasuke referred to as "uncle and aunt". They might not really be his uncle and aunt, but again, both the "uncle" and the "aunt" are Uchihas. Either the Uchiha clan loves intra-clan breeding (okay that sounded like raising animals in a zoo), or they did that to protect their kekkei genkai. Maybe the Sharingan has to be passed with both parents as Uchihas? That would make sense, which is also why I think Neji and Hinata might POSSIBLY end up together to protect their Byakugan. Incest was not a crime or a problem in countries like Japan until very recently. NejiHina and Sasu with another Uchiha sounds a little weird, I suppose. I dunno, prove me wrong Kishi anytime. It's just my little fantasy.

I think Kishimoto will create another character for Sasuke, possibly an Uchiha if my thinking is correct. How another Uchiha is going to pop up is beyond my imagination. Totally unrelated, I am currently writing a fanfic about Sasuke ending up with an Uchiha.
I mean, for goodness sakes, no characters now are really suited for him. After the latest chapter, SasuSaku... kinda went down the drain. I seriously hope Kishi will not drown all the hints he has poked into Narusaku direction, turn around, and make it SasuSaku. Right now that seems very unlikely.