And then Neji will give Sasuke the Byakugen so that he can sure that he wont be found!I think Sasuke will actually, after talk with Itachi, realize who is right and who is wrong. He'll sort of suddenly lose confidence in his power and fall on his knees. Then he'll get back up and say "go help out Naruto, I'll kick Kabuto's butt".
Since Itachi was such a good, caring man I believe what he did has not been done for nothing. Sasuke will eventually regain controll over his hatred and help out. Then of course will be judged by everyone and people will want to kill him. Naruto will want him to join Team 7 again but Sasuke will just say that he is no longer wanted in the Village. He will say that honor has been redeemed and will leave somewhere and never show up again (of course after a touching dialog with Naruto).
Edit: Also I see it this way. At the end Sasuke will see that he met the requirements to posses the Rinnegan. Though after that touching dialog blah blah blah, including "I guess we'll never see who's stronger" he will give Rinnegan (and Sharingan in it) to Naruto, saying that he is the one who should, by the power of So6P, bring peace to people, and that that's the only way to fulfill his beloved brother's wish. Then without the eyes he'll become a wanderer and disappear forever.
And then Sakura will give Neji her eyes so Neji can see again!
And then Sakura will be blind. forever.
LOL!!! I kid xd