I want to see Kakashi's reaction when he sees (hopefully) his sensei, Minato. I think that would be a cute moment between them, lol. And also, Minato's reaction to Obito when he finds out that the masked man who tried to kill his wife, his family and his entire village was Obito himself. I can't wait for that to happen!
OT: I think Kakashi will forgive Sasuke, and hopefully that is true. We all know that he has a soft spot (as conveyed when he didn't kill Obito when he had the chance to), and he knows about the Uchiha's past. So I think he will forgive his former student.