For years now it's been speculated that the New York Rangers would be heavily in on Patrick Kane due to his chemistry with their star player Artemi Panarin, and well, if the Rangers want him, they are going to be giving up a big piece of their future:
While there will be more details that go into this trade, these would be the main pieces going back. At this point, neither player has quite worked out in New York, so a fresh start could be good for both.