Seriously guys, there is no roof that NH is confirmed yet. Just because advertisments are hinting at it, doesn't mean it's gonna happen.( we've been through this with RtN.) Even if NS is not canon in the last chapter, it can still be canon in the epilogue, which takes place after the movie.
Clearly Sakura is playing a larger role than the trailer is hinting at, seeing as we have multiple screen shots of her, her talking to HInata, and her going on the rescue mission. For all we know, Sakura could be trying to figure out how to confess to Naruto, but the advertisements can't show that, because it would be obvious NS goes canon.( Don't give me that, she's encouraging HInata crap, because Kishi already shows how Sakura feels about knowing HInata loves Naruto. Hinata could just be down on herself and Sakura is cheering her up, she's a kind girl, remember?)
Besides, are you telling me Naruto, the guy who never gives up, is going to give up on the girl he's been loving since his academy days and has shown zero signs of changing throughout the whole manga? You can't just base what pairings gonna be canon on this movie, you need to look at the Naruto series as a whole. The whole series is pointing towards NS, while advertisements are pointing towards NH, that should tell you somethings not right.
If Kishi had intended for NH to happen and knew he was making this movie, he would have had plenty of time to try and drop more NH hints in the last few chapters or at least show Naruto's love wavering, but he didn't. A pairing needs more than just one person loving the other, to go canon.
Please, stop saying NH is canon or the manga is opoen ended, because you don't know that, it's just your speculation!