Sasuke kills Itachi
Pain Kills Jiraiya
Pain Kills Tsunade
Sasuke kills Itachi
Sasuke kills Kakashi
Pain kills Jiraiya
Sasuke kills Tobi
Naruto vs. Sasuke
It boils down to that last one, the others might happen, it'd be cool though if this happened.
Meanwhile, Pain's got the world under control and is being a fricken awesome fascist dictator God he is!
Sasuke kills Naruto
Sakura brings Naruto back (Same way Gaara comes back AKA: Sakura dies)
Sasuke feels bad and teams up with Naruto to beat Pain