Even if we got another Chunin Exam and Naruto and Sasuke are in it, it would just boil down to these two anyway. They are Gokage level fighters. The Chunin Exam would be a waste of their time. If anyone needs proof about Naruto's powers all they need to do is look who's saving the entire shinobi alliance with his Kyuubi Cloak, LOL.
I agree. Those two are just too powerful and it would make the tournament predictable. It would be a waste of time especially since I doubt anyone would even compete against them; Konoha will probably have an alliance with the other major villages after the war anyway. They just need to fight over the Hokage title and then the manga can end.