I'm not sure if it's true, but I read something about an Interview where Kishimoto stated he originally intended SS and NH, but later began to rethink the pairings
quote:
"He said that he originally planned for Naruto and Hinata, as well as Sasuke and Sakura to end up together. But now he feels that it was mostly “wish fulfillment” that made him decide on these pairings.
He admits that lately he feels that Naruto and Sakura should end up together instead because he noticed the similarity between Sakura and Naruto’s mother, Kushina. However, he doesn’t know how he can negate Hinata’s sacrifice for Naruto and the recent events in chapter 615 without making Naruto look like a fucking asshole.
"I should’ve just killed off Hinata way back then," says Kishimoto, "She’s not even the heroine and I made her so I could have another big-boobed character really. Could she honestly make Naruto happy with just that?"
He also said that if Sasuke and Sakura still end up together they will need serious counseling.
"Sasuke and Karin just have a much healthier relationship…Karin loves him even after he stabbed her. That’s true love right there. Maybe I really will change the ending and make it NaruSaku and SasuKarin." "
~Kurama