I see him fusing Nine-Tails chakra with Sage chakra, then making a bunch of impressive ninjutsu and taijutsu. Maybe he can improve Rasenshuriken (maybe add wind-nature chakra to a Tailed Beast ball or something.
Yeah that's pretty much how he will look at the age of 18-20, but don't you notice he doesn't have the scar-like lines he normally has in his face? maybe that's a hint he will lose the Kyuubi..