She figured that out a long time ago. Naruto, and even has outright said so (chapters 469-70). Look at chapters 245, 297, 343, 450, 469-70, 474, and how Sakura reacts to Naruto's rescue of her for absolute proof. I get a bit annoyed at the people who go on about chapter 540 as if it says Sakura is still the swooning 12 year old Sasuke fangirl- does she look happy? Nope, she looks sick and ashamed that she failed Naruto and wasn't able to eliminate every bit of the memories of her feelings for Sasuke, and feels sick and ashamed of herself as a person-beating herself up as some sort of sick person for having even the remnant of the memories of those feelings. Instead of trashing Sakura as still being a swoony Sasuke fangirl, you are supposed to feel sympathy for her agony. She didn't realize it would be harder than she thought to eliminate all those feelings.
It's more like Sakura will be kind of freaked out by seeing this Sasuke that acts like what the naive 12 year old Sakura thought she wanted. To 16-17 year old Sakura it will feel overblown and creepy. Sakura is a calmer person than Naruto when she is freaked out. As I pointed out before "doki doki" is also attributed to someone panicking inside. And considering she flinches back, clutches her hands tightly on her robe and her eyes look kind of freaked out, I think it's obvious that she isn't getting all swoony about it.
And Slextrem, I see that as a misinterpretation of the scene- People are reading it as if Sakura knew Hinata made her confession, we know Sakura did not. Sakura didn't even know the sequence of when Hinata went out and when Naruto went 6 tails. I see it more as it brings back to the fore Sakura's own romantic feelings for Naruto (Note the kind of romantic image of Naruto in Sakura's thoughts...) Sakura has known for certain that those confusing affectionate and concerned feelings she has had for Naruto since sometime before chapter 245, was romantic love since Yamato made it clear to her in chapter 297.) From Sakura's perspective Hinata did exactly the same thing she had done in 296. She probably thought Hinata got hurt in something of the same way Sakura had. She figured Hinata cared deeply for Naruto too, it was more a reminder of her own foolish act and she was telling Hinata to not put her life in danger for something she couldn't fix that way. It reinforced to Sakura that she indeed was in love with Naruto... Thus the romantic hug of Naruto in front of the whole village in chapter 450.
It's almost exactly like how the love letter nin reminds her in a painful way of the girl she used to be who crushed on someone who had no feelings for her whatsoever, and how she thinks how awful and sick a person she is to still have any feelings whatsoever for the monstrous person she sees as the real Sasuke- It draws her inside herself, makes her dwell on her own feelings. Both moments are painful, but regarding her feelings for Naruto, just mildly so, and it motivates her to show her feelings openly to Naruto yet again. Thinking about the remnants of the memories of her feelings for Sasuke makes her start to get depressed. Luckily this is part 2 Sakura and it doesn't affect her mind and skills as a ninja and she quickly takes down Zetsu Neiji with a combo of sharp intelligence and physical strength...
I totally agree. Sakura is currently and has been for a long time now,
the Naruto character which I have the most sympathy for. I remeber once when someone on a forum compared Sakura to a punching bag, because she was just taking hit after hit after hit, both physically and mentally. To me, this really describes Sakura's character during the summit arc and beyond quite well. I mean first she learns that she has unintentionally been causing Naruto a great deal of pain for such a long time. Then she tries to relieve Naruto of that burden, only to have him act like an a**hole towards her (he was somewhat justified though). Then she tries to go and kill Sasuke, knowing full well that if she succeeds Naruto will probably hate her forever and then what happens? Ultimately, she can't do it. She must have felt like a gigantic failure.
And then we have the lover nin scene which once again, as you yourself pointed out, only served to painfully remind her of how much she "failed", once again feeding her self destructive nature.
So I'm not trashing her or anything. I totally understand what kind of emotional situation she's in. What I meant was that meeting this AU Sasuke could potentially be the final straw for her and that she will finally realize that
"This is just never going to happen. I can't keep dwelling on these silly old feelings. All they're doing is holding me back. I have to move on... For real this time!" I know, I'm not very good at writing dialogue. One of the reasons why I don't write fanfiction.
Anyway, my horrible script writing aside, by point is basically that this movie might give Sakura the necessary push towards that "love epiphany" that some other members have already talked about. I know this theory is a bit sketchy since we can't really be sure if this movie can be counted as canon or not, but with everything that's been revealed so far, I don't think it's completely implausible.