I just don't see this happening. One reason Bob laid it down is he was tired of having to put the time and effort into recruiting that was needed. He got lazy and wasn't the same "driven" coach he was when he was first hired at OU.
Or hell maybe Bob has gotten tired and already forgot about why he laid it down.
OR .... Bob knew that OU would never be the program that fan expected as long as Mike was the Defensive Coordinator. And Bob couldn't fire him. So Bob quit and let someone else handle the problem.