I can see Melo becoming available. If Porzingis shows early on he's going to be a good player then he quickly becomes the future and untradeable. Then keeping Melo makes no sense and they can get a slew of young players and/or picks for him before he gets even older (he's 31) and his value decreases. I doubt in his heart Jackson is real Melo fan and wouldn't mind jettisoning him and starting over. For one thing, it would buy him some more time to keep his job.
Channing Frye might be available, he'd be a good fit for a contender. He didn't have an amazing year in Orlando and he's already 32. The Magic are gonna suck for awhile, why not try and get more assets and open up room for Gordon/Harris/Hezonga?
Dion Waiters - OKC has got to realize soon, wait this guy is kinda horrible.
Wilson Chandler, JJ Hickson - Going to be free agents and probably not really part of Denver's future.
Nikola Pekovic - Not that Minny has to deal him but Towns and Dieng need to play minutes.
DeMarcus Cousins - He would have to force his way out for it to happen, because Sac ain't about to let their franchise star go just because he's grumpy or doesn't like the coach.