I bet he will stay one more year. Parker and Embiid coming out early are the dreams and fantasies of everyone else but them probably
They know they are good and want to improve further. They want to enjoy the college experience also.
From what i read, most want to experience at least 2 years of college , unless 1) They are struggling academically 2) Need the money to help out Family (like Steven Adams) 3) Already accomplished everything possible (like Melo or Anthony Davis leading their teams to a championship win)
i bet though Wiggins is coming out for the 2014 draft. He is prob tired of all the pressure and wants to go pro. Randle, Smart, Exum also likely.