I don't think it will happen either, but if the Celtics want him, and Melo wants the Celtics, it will probably happen. Knicks supposedly want him out to start building around Porzingis, there's limited options with his no trade clause, clippers are the only other team really getting mentioned and they literally have no assets to trade, it would be a straight salary dump. If the Celtics give the Knicks something of value they'd probably do it, without the Celtics giving up any of their best assets.