Who cares? Fans will start a riot and will be disappointed either way if its SasuSaku, NaruSaku, SasuKarin, NaruHina.
If Kishimoto doesn't give a damn then he'll choose what ever pairing he wants or end the series without a making making certain couples official.
Nagging Fans:
NaruSaku: Disappointment because Naruto didn't choose Hinata after she loved and supported him for years. SasuSaku fans will rage because Sakura has loved Sasuke for so long and now just goes to Naruto (If you are a fan and in the right mind, you would know that pairing died a long time ago and you would've given up to if the person you like tries to kill you...twice. How sad would it be for Sakura to tell their future kids someday how they fell in love? >.>).
SasuSaku: Disappointment because Naruto never got his girl and he's the hero of the series. After years of trying and being known as the person to never give up and never loose to Sasuke, he looses Sakura... to Sasuke. People will also bash on Sakura more for choosing a guy who treated her more like crap when he left the village and not returning Naruto's feelings who loved, cared, and protected her through out the years. SasuKarin fans will hate because... well I don't really care about their opinions. I guess... because Uchiha+Uzumaki didn't happen?
NaruHina: NaruSaku fans will die considering Naruto loved a girl for so long and suddenly goes to Hinata. What message would the audience receive if Naruto all of a sudden gives up on Sakura without a trying (seeing that he's known to never back down so easily). Unless Naruto confesses, gets rejected (which leads back to the SasuSaku disappointment), and goes to Hinata as a rebound (No where in the manga has it been said that Naruto is over Sakura. He has yet to confess his feelings for her and holding Hinata's hand isn't going to simply change his mind about a girl he loved since he was a child).
SasuKarin: SasuSaku fans bashing about how Karin is a fangirl and obsessed (proven in manga) and how Sasuke should've chosen Sakura since she loved him for so many years. Blah blah blah.
Basically, it doesn't matter because the pairing goes in a cycle, all having bad results if any of them happen. Chances are Kishi might not even bother... hell, I wouldn't considering all have loved one another for years. >.>
Sakura loved Sasuke for years.
Naruto loved Sakura for years.
Hinata loved Naruto for years.
Karin "loved" Sasuke for years (confirmed that she knew him since the Chunin exam).
-Unless they get a final rejection and reasoning, pairings wouldn't turn out so well.
Romance is in the hands of Kishi... :| Brace yourselves.
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