The longer it drags on, the more I'd be convinced that it is a current head coach with a pending CCG who wants to do right by those players and not disrupt that. There would be no reason for a non-head coach not to leave or at least be announced.
Granted the same sentiment would also apply if said team is going to the CFP but if you are going to take over a new team, you can't wait until late December to get going. So I think in the slim chance the coach in question is heading a CFP team, they'd have to leave before the playoffs.
So anyway, I'm guessing that if Kraft is actually organized and doing a good job that it is Chesney or Sitake (or I guess DeBour as a huge longshot). If someone is not already in the bag then Kraft has f'ed up big time.
Edit: I'd also put Diaz as a real possibility as one of the coaches with a game next week.