I would not be surprised if Doc and DA arrange things so that Danny has full responsibility for whatever happens next.
For example Doc can say "I would love to come back and coach the team we had last year for one more run. However if Danny feels that a change is in order, and my moving on is part of that change, we will work together to make a deal that helps his goals as GM of the Celtics, and also does right by any players - or me as the coach - involved in the transactions."
This would leave the door open for any possible outcome, without making Doc the fall guy, or burning bridges with the players if he returns.