A lot of assumptions here .... first that CBN will hire an OC, and that he would hire a current OC from the college ranks.
It is safe to assume there will be staff changes, since Armstrong left leaving room to hire one more assistant.
It is not clear if anyone else is leaving.
It has been reported that there are a number of contracts that expire at the end of this month.
Also, don't forget about the NFL which has it's last regular season game this weekend, so he could hire someone from those ranks.
The other thing that I suspect is that CBN does not outright publicly fire his staff, outside of Raymond and Spencer - both of which were rumored to have not held their players accountable.
So if he is planning to "fire" someone, I suspect that will happen in the next couple weeks to allow whoever is leaving to find a job in the NFL, or elsewhere.
So I am guessing most of the hiring/firing will probably not be finalized before the middle of this month, and more likely toward the end of it.