I don't think any of them in this class are one and done caliber. That doesn't mean they won't try, but there's on one in this class with that Hawes/Wroten transcendent caliber talent. Even Roy and Ross weren't one and done caliber guys. I think they all play two years at least. If someone ends up better than advertised, great.
I have it on pretty good authority that Baby Boy is staying more than 1 year.
Only exception would be if he was a projected sure thing lottery pick (not happening unless he has a monster season).
No idea about Chriss, but he's the only other player with a chance of leaving for the NBA. I seriously doubt he does. The 5 star kid from Maryland is a more likely 1 and done than the guys we already have. Assuming he actually signs with UW...