There's also a thing with Naruto confession, i think it's impossible for her to reject Naruto, because let me tell you two cases, the first is Sakura completely in love with Naruto result is that she will accept.
and the Second is she's not in love with Naruto, result is that she will accept anyway and you know why.
For SS or even NH naruto must never confess.
Well its not like Naruto can suddenly just step away from Sakura after all they did and there are a few issues prevalent to NaruHina and SasuSaku that would impact the story on a strucutal point, it would impact too much and undermine the goals of some characters in some cases.
For NaruHina, Naruto cannot suddenly just love Hinata, he would need closure with Sakura if that's how he really felt, in order to go to Hinata, Naruto would need a good reason to reciprocate those same feelings, he cannot just jump over Sakura to Hinata, you don't just have an event in which you just end a relation and then just "leave it open for another." This is essentially what many anti-narusaku fans believe, that the relation ends so Naruto just happens to start loving Hinata in these late moments of the manga, regardless of the other plot elements, mainly team 7 and other issues like the bijuu, SOT6P, curse of hatered. In all of these story elements to them its just "insert affection for Hinata here into Naruto" yet the rest with team 7 mainly still goes on.
Naruto cannot suddenly love Hinata, he would need closure with Sakura to see if she really still liked Sasuke. Right now naruto is focused on Sasuke, others take a backseat to him, Sakura is higher up there cause of the team 7 element but Hinata cannot suddenly take more importance in the overall story factor, she takes a backseat to Sakura who takes a backseat to Sasuke. Heck I can say the second most important person behind Sasuke for Naurto right now is Kakashi because Naruto can understand Kakashi is conflicted over his own friend too being revealed as the harbinger of doom.
NaruHina can happen, but not without rasing a few issues, first there is Hinata's confession, if there is downtime after the ten tails (I think that Madara and Obito may temporarily retreat but with the ten tails, even then Madara would need time (like a day or few) to master the power of the ten tails once revived before launching the eye of the moon. It would need to continue forward from this point now, and much more. It would have to be enough for Naruto to turn away from Sakura but still keep Hinata out of the team 7 conflict.
However this is the ultimate result if NaruHina happens:
-Hinata is the only one with a crush to get "her ideal crush" out of minimal interaction. Would have happened basically because "hinata hoped it would."
-Would be too convenient on Hinata's part, espcially with Sakura's confession and Naruto knowing she did it for his protection and feelings, it would be insane to think that Naruto could convince Nagato to go good and be friends with Kurama but not forgive Sakura for her actions designed to protect him.
-Would occur as a selfish desire of fans in some cases and completely twisted perceptions of a minor character.
-Would prove Kishi chose minor development out of others, possibly caved into fan demands ruining creative freedom because of their preffered desires.
-Would be out of place considering there was reason for Naruto's support to Sakura but only fulfilled Hinata's one-way development for herself, not much for Naruto.
-Would be too rushed and crammed, would prove any character can get fulfillment with little screentime.
-Hinata would ultimately have proven to be one of the most 1 dimensional characters in any anime, keeping one mentality focused on one person and not really changing much in the end. Neji would have had to die for this?
-Would become the most annoying thing of any manga fanbase because these fans would basically think they had some entitlement and would make the series get an incredibly bad name and image more than it already gets labeled with.
-Would think its some sort of status when these pairing things don't even matter in the first place.
Even more issues on the SasuSaku side, again SasuSaku cannot occur without tons of things just upsetting the story. Sasuke's relation with Sakura was not that complicated as some fans try to make it seem. Sasuke only liked Sakura as a friend but abandoned that with leaving the leaf and especially almost killing her twice. Yes Sakura has a reason to still love Sasuke but we don't know how she feels, is she really still involve with the phsyco or could she change? Thats what many anti-narusaku fans don't consider, if Orchimaru was able to gut the reaper and get the hokage souls and his arm's souls (body parts have their own souls?) then how hard is it to imagine Sakura possibly turning away from Sasuke? People act like it is an impossibility like how people in the 1800s said the lightblub was going to fail. It is highly capable and possible of happening, character development and all but to them it is an engima. But there are so many issues with this, it would cause a lot of upheaval and kishi would literally need to try and convince us in a much greater way how this stuff could even work.
There would be a freaking ton of work ahead of him this late in the story to make Sasuke change. Same issues on Sakura's side to keep her static. Sasuke would need a good reason to love Sakura, he can't just do it because she does. At the same time this would be very downgrading and wasted development on Sakura, Sakura would have kept her one static mentality that drove her to do some unwise things, not to mention forgiving him for nearly killing her twice.
If SasuSaku did occur, these are the ultimate end results:
-Sasuke given a trait he never really needed, only Naruto should be the one to show him his future of returning, no one else.
-Whatever reason Kishi could put in for Sasuke to love Sakura, it would still be happening for all the wrong reasons, basically it would occur and Sakura would get her crush "because she hoped."
-Sakura would have kept the one mental quality that could have been overcome and made her a greatly developed character, Sasuke is important to Sakura's mental being and always caused issues for her and Naruto. If she could do something about that like overcoming it or so, she would see a better reason than Sasuke, than her idealistic crush.
-Sasuke returns but still does not love Sakura, back to square one basically, its like the start of the series but Naruto completed his promise but without any real lessons learned saved things happen merely out of hope, effort does not matter in this universe apparently.
-Kishi would ultimately prove that he cannot handle heroines and has no concept of important character development or reasons for giving them certain qualities.
-Sasuke would change for useless reasons and Sakura would have remained utterly the same in the end, no real development and the stuff others encouraged her on would have gone to waste.
There are a lot more reasons than just these but the fact remains, these would be so damaging to the story, mainly on SasuSaku part, it would be utterly insane. NaruHina can occur but it would still have some hard impacts and leave more unfilled logic than addressed answers. It would be like at this point Kishi should just have Shino and Ino start making out now because he would not want to keep the majority of his consistancy for his characters if things like these began to occur.