A couple additional comments based on things said in this thread so far, assuming the rumor has some basis in reality, however slender:
(1) small ball, here we come -- I expect this means we'll see Green at the 4, KG and BB at the 5 a lot more than we would have imagined.
(2) Danny is collecting assets. He views Jeff Green and OJ Mayo as potential assets to be used in a bigger trade a season or so from now. Assets in the sense that both these guys are players that haven't matched their high expectations, but the goal is to see if a change of scenery + playing with uber-competitive Kevin Garnett changes that. Same goes for Sully and Melo.
(3) Given (2), don't expect to see DA use many draft picks in his attempt to pull of a S&T for OJ Mayo. DA will want to preserve these for future trades.