I say odds are still low. In my opinion, Durant probably wants to be with more established stars, or at least a city he wants to go
Washington - incentives? -> hometown
OKC - incentives? -> continue to play with Westbrook, they're also playing as of late...we'll see how well they do in playoffs
GSW - incentives? -> I am hearing rumors, you guys are probably seeing the same articles, play with Steph, and possibly a team with back-to-back championships.
I see very little chance he comes to Boston even with Horford gets traded here. I'll even go as far as, even if we somehow manage to get Cousins to Boston, Durant probably still don't want to come here, unless we get like Westbrook, or possibly Melo (Melo is my own speculation, I have no proof, I am just guessing, a possible Durant and Melo pair seems good on paper)