IMO if Kishi make NS canon he'll just have to say that Sakura confession to Sasuke was just an attempt to get him back from 'darkness' (like Sakura did to Naruto to prevent him to go on battlefield).
In fact this kitten confession was foreshadowed by Kakshi who told her that she can save Sasuke from darkness but it's obvious that it is Naruto's job. So she just tried to do it with an ambiguous confession (IMO she just loves him as a teammate right now) and as expected it failed.
And for what Kakashi said to Sasuke after he made his genjutsu on Sakura, he just interpreted what sakura said as he wanted as far as i know he doesn't know about her real feelings... (we don't know either and even sakura doesn't really know I think xD)
the logic of NH/SS fandoms never cease to amaze me
Guys, it is so obvious that he was talking about hinata!!!!!11!! And he was hesitate because he didn't confess to her!! And for this reason he must gives everything for a great confession!! That's why he will give his best!! And Minato smiles...because he noticed Hinata at some point!! Remember the hinata's panel during the question of "girl friend"?? THAT!!
i had a cancer, MORTAL.
beisdes SS fandom did even some analys regarding the perspective of Sakura's smile towards Sasuke... LOL