Some people have said the Hinata stuff is important, maybe symbolic in someway to her, but in the overall ordeal its just how again infrequently kishi is using Hinata which makes her hard to figure out.
I mean not going by just 631, but as I said if Gaara is in fact taking them to Minato, if the current events lead to Sakura either having more feelings surface, have a remembrance of the chiyo stuff, result in more sakura and minato interaction in which he makes more of a reference to him being glad there are people like her who care for naruto, or something again minakushi related, then its just going to be harder to figure out.
I mean really if we want to count NS and NH like its been recently, then it would be like this:
There are things greatly hinting at NS such as naruto still loving sakura, the sakura kushina parallel, the development, sakura not trusting sasuke (this is not direct but it has a bit of meaning towards this in hindsight, mainly on Sakuras development) yet with stuff like today with NH just seemingly popping up, its like he just places her there but doesnt do anything with it, so its like you get a hint of where the NS stuff can go, I mean the Sakura kushina stuff is easily linked and refereed with the Kushina foreshadow+ background with Minato way back around 506 or 508 around there. This time we can see a possible comeback of what Chiyo told Sakura, one way the stuff of when a jinchurki has their tailed beast removed and her reaction to this news, the other how she said to risk her life for the ones important to her. Otherwise it could be this with more minato stuff. Really yes, Im not saying this as a NS fan, just from a basic standpoint as a longtime reader, these are just highly probable things that could happen mostly based off past dialogue and events. Stuff like the sakura minto interaction going again is also likely because if Gaara is heading there then well, I wouldnt be suprised if Minato asks her more about or at least gets her name.
But with NH, its like stuff is been done with Hinata, but kishi isnt exactly moving it anywhere, I mean he did bring the death of neji up but out of the stuff we have seen in 615, its been more of nejis death coming up again and again that actually lead to some stuff rather than the hand holding. If anything it seems that the big NH chapter, 615, the aspect of Neji's death is already making the hand holding less and less significant. Its all because the times HInata is used, she isnt going anywhere, I mean sadly this chapter in a lose term can be what kishi has done with HInata, just repeat Naruto-kun again and again like a broken record. Its been like this the majority of the time we saw her every now and then in 2013, at this point its like, really Im not concerned about NH as much, rather, I'm concerned for Hinata herself, just what is kishi doing with her? I mean if anything it seems like Hinata is just stagnated and standing still, really if in the coming chapters what could you see in the immediate future with her? I mean seriously, this is why im worried, its still true without Naruto, Hinata would no longer have any purpose but even then Kishi has still thrown more in with Naruto and Sakura together over Hinata in there. Even so he could have done the same thing as he could have done with 631, as Kishi could have foresaken the Minato stuff with Sakura or ignored the Sakura Kushina parallel, he could have made Hinata catch up and ride with Gaara and Sakura, but he didnt. Really if it comes to it in the next few chapters Sakura starts hinting some unforeseen feelings for Naruto and Hinata later gets notice of this, I wouldnt be suprised if NS goes on later and Hinata ends partly being happy for Naruto. I wouldnt because when you dont use a character much or leave enough to figure out where they will go, you dont expect as much out of them. This is why I really dont expect anything big from Hinata, she is there and will have an ending, but with less and hardly any interaction, I just dont see NH magically coming as some do.