He'll actually be draft-eligible in 2017 I think, since he's from the Bahamas, and will be 19 in 2017, although he'd have to stop high school before graduating (since he can't "complete" high school in the U.S.).
And as that article talks about how his school might not qualify him for college in the U.S., it could be an option for him. I'm more confident in the 2017 Nets pick being a great one than I am
2018.