Bridges have been burned...I can't picture IT or Kyrie returning to their respective teams, and acting like everything is just fine.
It would be much better for the Cav's because Irving is still going to be traded anyway. The Cavs just begin listening to offers again.
But for the Celtic...this is conformation that the hip of IT is serious and will linger long term. The Celtics would be stuck with an asset that has little trade value, and is regarded league wide as damaged goods.
Even of the Cavs ask for more from the Celtics, its a signal that IT was a LONG way from playing again, or ever being the IT of 2017.
If this deal is canceled, it would be a disaster. I don't want to even think about it.