Scenarios where Butch leaves:
(1) Michigan or Michigan State call.
(2) Notre Dame calls.
(3) Realizes he's not cut out for the SEC.
(4) Gets fired.
(1) Not going to happen. Harbaugh is at UM until and unless HE decides he wants to go elsewhere. As for MSU, it's going to take another year like this one before they even think about changing coaches, and if they do they'll go after a proven name, either college or NFL. That excludes CBJ.
(2) Not going to happen. When ND is back on the market (sooner rather than later IMO), they'll look to the NFL (again, IMO).
(3) Not going to happen. Ego too big.
(4) Most likely scenario. This is an 8-9, maybe 10 win staff. It's going to take a new AD who's willing to back up a dump truck full of money to get something better.
So...CBJ is here for the near (~ 5 yrs) future. Could be shorter if we fall back to a 6 or 7 win team. Could be longer if we make it to a SECCG or two.
Best bet is to hope he can finally get the BSiA, and let them do their job.
Go Vols.