NBA rookie contract is a four-year deal for first-round picks with the team having an option to keep the player for years three and four.
Last year's draft (over 4 years):
1st Round 30th pick 11.2 million
1st Round 20th pick 14.1 million
1st Round 15th pick 18 million
1st Round 10th pick 21.8 million
1st Round 5th pick 32.9 million
Various Mock Drafts
nbcsports.com: Portland #13 (updated 2/14)
cbssports.com: Sacramento #14 (updated 2/13)
nbadraft.net: Portland #12 (updated 3/14)
bleacherreport.com: Utah #15 (updated 2/22)
USAtoday.com: Toronto #14 (updated 3/6)
If he goes this year, he will make close to 20 million over 4 years. Will see minimal time on an NBA court next year, and likely take 2-3 years before he sees any serious time. Also, would depend on what team he went to. Would be more beneficial for him to go to an established team where he could learn from others and be eased into everything.
If he stays, he is likely a lottery pick next year, making close to 30 over 4 years. GG, Meechie, Jacobi, and Gray will be improved, but we could really use a stud transfer or two to make any significant impact on a winning season next year. Tourney bid, even with him returning would be a little far fetched, but not impossible.
Most likely he is headed to the draft, but as some have said, he has not made a decision yet. This hesitancy leaves some doubt.