-Sasuke left Konoha.
-Naruto and Sakura are getting closer.
is that all? Uhh... Naruto and Sakura are still trying to get Sasuke back, even after witnessing his bastard-like personality. I mean, if Naruto and Sakura gave up on retrieving Sasuke, than SasuSaku's status as dead would most likely be acceptable, yeah? ^^ Its still out there buddies.
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Well, as a timid character with a passive personality and an unimportant role, she's not a character that leaves an impact on the series in general. She's too weak a character.
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there isn't anything in that conversation that specifically screams that it was important that Hinata was with him at that very moment. I could honestly see Sakura, replacing her there. I say this only, because Hinata doesn't leave a very strong impact on the Naruto series.
And how does this decrease the possibility of the NaruHina? This just shows that she is a side character. Romantic relaitonships that relate to Naruto don't necessarly have great impact on the story nor are they considered to be important when compared to other issues in the series. (Naruto's feelings for Sakura doesn't really impact the storyline, unless I missed something) ... sorry, just keeping up an open mind ^^
Anyway as far as I know, evidance can prove less to nothing because the story can go any direction (FMA anybody?) eck, but Kishimoto would probably go with a clean& cliche storyline.