I said it before, he is going back to "save" Naruto once he see's what happens when they extract a tailed demon. Sasuke is not an evil person. He's had ample chances to kill Naruto and co, and has'nt.....and won't.
Though I think he will go back, see that yet once again Naruto has passed him in power yet again, and he'll get pissy.
I'd love nothing more than to see Sasuke get his ass handed to him one more good time though, I just don't see it happening at Konoha, fighting Naruto....yet. I see him going and fighting Pain, and Pain whooping the tar outta him, proving that Rinnegan far surpasses Sharingan as the top eye ability in the world. (and it does)
Naruto will step in, and save Sasuke, kill Pain, (or injure him greatly) and Sasuke will get mad and run, saving the fight for Naruto another day.
At the same time, I think Tsunade will fight Konnan and defeat/kill her. Maybe getting mortally wounded in the process, or stepping down as Hokage for the loss of so many good ninja.