No matter what pairing moments come up in the anime there is still 631 beyond all that, I mean face it, 631 caused a bigger fallout than 615 because when 616 came, people on both sides were like, "oh wait that's it?" nothing special happened after that, yet there were still too many questions lingering on with what about Naruto and Sakura's unfinished interaction? Etc. 631 however, caused the fallout among the fanbases just because of Minato and him seeing Sakura as similar to Kushina and seeing Kushina within Sakura.
Its as one reviewer said, "Minato became the ultimate troll of the pairing fans, basically he advocated a parallel many fans thought would be true but put it on a character who is not as popular as the one they all wanted."
I still remember that day too, it was chaos and flamewars everywhere, not the best of days but it was nice for our fandom. But the aftermath of this event still just lingers around too, this has been longer lasting than the 615 events I mean people are still heavily debating what Minato meant when its really just a simple Sakura=Kushina, when this comes in the anime its like how much more must these things be brought forward? The anime is not going to change the source material, its still going to be Sakura=Kushina a couple weeks after the episode containing 615 airs.
The reason is still just so simple, Kushina created a foreshadow, basically to find a girl like her, Minato built on that and compared Sakura to Kushina, Sakura is the only girl who is said to be similar to Kushina, its again that simple. This foreshadowing element will return, but as it is right now, the foreshadow is untouchable and with NS, its not a moment that just disappears, its a story element and it will return in time. Unless there was a very important or valid reason to change this, I don't see it going to NH anytime in the future. As it is right now, the parallel either sticks and NS goes canon or it does not and the parallel dies.