Based off of the Dunc and Dak podcast alone, I think DJ Wilson will leave if he has reason to believe that someone will take him in the first round. Not gonna lie, think any GM that drafts him in the first round deserves to be fired based on the fact that DJ hasn't shown consistent motor/toughness. He'd be a glorified 3 & D wing and I'm not convinced he can hit the NBA 3 ball consistently just yet. Wagner, meanwhile, I think comes back. He seems to enjoy the college atmosphere more than DJ.
I don't think it's unwise for either player to leave if they have a decent chance at a contract with guaranteed millions, I would do the same.