Here are some possibilities:
Kevin Love -Doubt he stays with Minny beyond 2015
Marc Gasol - Ditto with Memphis
Lamarcus Aldridge - Ditto with Portland
Carmelo Anthony - Interesting point by the OP. At first though you would think, NO WAY. Either New York or Los Angeles. BUT, what if next summer the Celts offered the Knicks a package revolving around Jeff Green?
Would New York say no? Wouldn't Melo like to play with Rondo?
Paul George - I know his contract is up in a couple years. If Indy doesn't improve this year, does George want out?
John Wall - Possibly, the Wizards and Wall have a falling out if Washington doesn't improve and Wall wants more money. Obviously, this would likely require a Rondo trade.
Kevin Durant - Doubt he goes anywhere, but I have a feeling that Danny would do anything to land Durant, whether trade or free agency (2016.) After all, if he had a choice between Oden/Durant, Ainge was going to select Durant back in 2007, if I am not mistaken.
Al Horford - Big fan of Horford's game. I believe he becomes a free agent in 2016. If Atlanta fails to improve the next couple years, does Horford become expendable?
Joakim Noah - Ditto with Chicago. If the Bulls don't improve the next couple years, does Chicago give up on Noah and find a new 1-2 to match with Rose?