I think it's far too late in the manga for any shippers to change their mind. We have about two or so years left of chapters, as Kishi stated, so it'll be hard for anyone who's been shipping for a while to digest any rival pairings.
IMO, NaruSaku has the highest chances of happening because of the way Sasuke has treated Sakura. 540, while confirming her feelings for him once again, really showed how much her view of him has changed. He's not a good guy; it almost seems like she's ashamed/depressed because of loving him. Of all the main romantic based characters (Naruto,Sakura,Sasuke,Hinata), Sakura has the highest chances of getting over her feelings. Naruto never gives up, Sasuke doesn't feel anything besides revenge, and Hinata has based her whole life off of her desire for Naruto.
Sakura has been shown/implied to have romantic feelings/deeper feelings for Naruto. That's also why, I think, this pairing has the best chances.
Edited by swagosaurus, 21 December 2012 - 10:05 PM.