Being an Allstar starts with who his trainer is, how much he trains and if he can stay focused on doing the little things.
He's an all-world athlete. He has the physical tools to become an AllStar but so does 70% of the NBA...
My advice to him:
Work on conditioning.
Work on his J. 3pter and mid-range.
Work on his handles.
Spend morning, noon and night with a personal trainer like Phil Handy to MASTER footwork and angles.
The difference in a role player and an AllStar is sometimes just desire and hard work...
Is it likely? Not...possible? Yes.