I'm more worried is about the great guy thing, Minato spoiled up that probably it will be Naruto and Sasuke that will beat up Obito so it kinda makes him a great guy also? a Hero? not on the same level as Naruto but that wont make him up for that and may make the Lover-nin kind of ambyguous because if it's like that hoping that Sasuke betrays Naruto once again on a very hardcore way.
About Hinata did she mixed her respond with her internal thoughts like They're both .... (internal thoughts "Smiling") because it got cut out by the black flames.
The same thing with Sai saying that Sakura doesnt trust Sasuke at all.
Also i do hate how Kishi put the focus on Sasuke and make Naruto like some kind of supporting cast not funny at all.
What do you expect? Kishoimoto himself is a Sasuke fanboy ^^..
Sai's words were his thoughts while Hinata was speaking out load , Sai had a motive to hide his speech while Hinata had not .
I dont really believe that Sasuke will defeat Obito what will be the point of it? I think Naruto will do it and that will lead to Sasuke's betrayal . HIs arrogant and jealous side will take over , or maybe Madara will twist him ?