Yeah, it's hard to believe that in the space of what less than a week (movie time), Naruto will no longer be in love with Sakura and he'll fall in love with Hinata
It really flies in the face of everything that we know of Naruto and his principles, doesn't it? No persistent attitude, just complacency and neglect. It doesn't concern him that he never got to confess, that his archrival effectively destroyed all of his efforts with just a simple OOC arm gesture. And now we're supposed to believe that Naruto has simply "moved on" to another girl with nothing to substantiate how or when this shift occurred? No. Kishi couldn't make an effort to try and reinforce the SS/NH relationships in manga, so he needs to rely on the tools from Pierrot's anime to somehow make this progression look not so half-assed to viewers and readers.
Sorry, but I don't consider this movie or the epilogue canon. They don't deserve the honour. As far I'm concerned, the ending will come when/if LadyGT creates an alternative.