It seem like towards the end of this latest chapter that Sasuke is begining to reawaken his will of fire. He thinks of how all his team mates risked thier lives to protect each other.
Now he has to protect them and now we shall see his true strength emerge ( as the 3rd explained to Orochimaru a shinobis true power wont emrge until you protect someone precious) For once he wont be fighting for some selfish desire of revenge & hatred but to truly protect his friends.
To me this just shows that Sasuke is not lost to the darkness there is still hope for him.
What do you guys think?