There's no way the deal proposed would happen. For any chance for this to happen, we'd have to be playing pretty good, New York would have to suck, and the Brooklyn pick and/or the Dallas pick would have to be looking pretty good for us to trade for them.
It could definitely happen, but I wouldn't hold my breath for it. Honestly, I could see LA getting impatient with Russell and/or Randle and sending him/them, salary filler, and picks for Melo before we get him. As someone else in the post mentioned, he has a no-trade clause and seems like a "bright-lights" type of guy through and through. NY could have a pretty good core in Porzingis, Grant, and Russell and/or Randle.