Alright, so I had a train of thought. One that may settle all arguments and let everyone both be right and wrong at the same time. One last time I am going to bring up 540, but not to decipher what the meaning of the scene was or interpretations, but rather a train of thought that occurred.
Going back to Sakura's confession we are told that Sakura lied. About what has been a debate for a while, but never really had solid proof on what she lied about. I think I found a way to prove it: 540. Not only is this scene anti-SS, but I feel also proves that without a doubt that Sakura is really in loves Naruto.
In a Kishimoto interview that has been brought up many times, he has said that at that moment Sakura was being "an honest girl, with a surprisingly stubborn personality." So to Kishi, she was being honest about something. Now as obvious it was to us that what she was lying about was her "letting go" of Sasuke, there really was no manga proof this is was it...or was there?
540 comes along and she thinks about Sasuke, albeit in a dark tone. People would say that it means she still has feelings for Sasuke. Maybe, but it doesn't mean she still is in love with the guy. It could be a form of her falling out of love with him which is a possibility and coincides with her confession to Naruto. See, if 540 proves that she still retains feelings for Sasuke, then that means that what she said about Sasuke was the lie and thus when she confessed her love to Naruto it was the truth.
Now here is the real kicker. The biggest part of this. If her confession to Naruto proves that she loves him and 540 proves that she still has feelings for Sasuke, but show darker thoughts then it just means even more that NS is still going up while SS is going down. Alone these two scenes could mean anything, but together they prove without a doubt that many things have changed and they still are changing.
To answer a possible question of whether or not Sakura still feels that darkness from Sasuke that she did in 540 or whether she actually doesn't think that anymore...look no farther than when Sai asked her if she trusts him. She gave that fake smile which again only proves that she 540 is meant to be anti-SS and her really moving on from him.
In the words of Ace Ventura
In all respect the land of iron confession scene was left ambiguous at the time, Naruto had neither spoke with sakura about it or went to talk to hinata about the confession.
Until 631 came, there was no proof of naruto being over sakura and otherwise him moving onto hinata. While 631 basically gives more credibility to him still loving sakura, the only clue at the time was that there would be an end pairing from what kushina said and given the likeness at the time, it was no suprise we were right about sakura being like kushina.
But aside from this the only clues here and there were a filler saying naruto still loved sakura and RtN otherwise though non-canon there was no other material for anyside to think which has a clue of what came up.
The one thing that as usual, makes the argument for NS in 469 not dying is because kishi commented on it, its almost like a blessing too. Obviously at the time, no info could be given exactly what she exactly felt for either one but yeah when 540 came out, the answer was simple, She is antagonized by sasuke, she is saddened by what he became, its not good or ideal, its just bad. 635 made it clear she has a negative view of him.
Its also true that despite the naysayers, NS has been given some scenery in the past year and till now. I mean opportunities existed for NH but it was bypassed, SS just shows more antagonism. The whole deal though is, because it cannot be brought out suddenly or occur believably, if kishi is going NS then he has to make these elements move towards the right time for well Naruto and Sakura to get together. Something on sakuras end is well, realizing love, getting over sasuke, etc. Maturing is part of her role if anything. Its like until the time comes, kishi has to keep showing the readers that sakura is slowly chipping away her old ideal love for sasuke and possibly moving to naruto.
Otherwise kishi could have just said Sakura loves Naruto and spoiled a fair portion of the future plot he would have been going on. But hey this is the same fandom that didn't believe obito was tobi for years, even though in right it started as an non-credible conjecture, it gained credibility as the series moved on, I mean for a time, people though Danzo was tobi or like a shade of him. This is the same fandom with its pairing portion that has a majority of them saying its impossible for sakura to ever love naruto.