There are a lot of things that will need to happen to allow the Big1G & SEC to basically take over the college football world and its playoff system. First, on the list for the conferences/schools is to take back control of the NIL process in terms of who is running the show. To make this work, I hate to say it, but they will end up having to make the players employees. This will then be followed by the players organizing to form a union which will be followed shortly thereafter by a collective bargaining agreement. Just like the NFL, you can't have the players running the show when it comes to escalating prices/compensation (NIL), and by making them employees the schools (owners) will take control and put a pay structure in place. In the NFL there may be some players at the QB level that can garner huge contracts, but for 98% of the players in the league, the owners pretty much control most things with an iron fist as we have seen players get frozen out of when the owners choose to do so. However, at that point college football will no longer be the same.
If things were to go that way, I don't think it goes very long before the football operations at those schools is privatized and they bring in a President and GM to run football operations like a franchise. The money will be too big at that point and you will need to have experts managing player's contracts and legal matters, which the University isn't setup to handle. So then, you have some type of agreement with the schools on the payout they receive and the AD can be left to manage the rest of the Athletic programs for the school that they still have the money to fund. Hopefully, we all aren't sitting here 10 yrs from now discussing how they managed to kill the golden goose that was college football and what it ended up doing to the rest of the college athletic programs.