Since they are bribing formerly great teams like Texas to join the SEC and get beat up on, they will need to wall off and boost up that conference more. You'll hear all the braindead talking heads boosting up this agenda on the talk shows. Maybe they will need to satiate the teams that get left behind to consolidate into a new structure where they get a little more money for now.
Has anyone done analysis lately on how ESPN keeps its empire going? I haven't seen this analysis pop up yet, but I have to think that more cord cutting will happen and put cost cutting pressure on the bubble. Cable subscribers will die off and not be replaced. Perhaps alumni of the handful of programs deemed worthy enough to compete can prop it all up with a pay-per-view model? Even then, I'm not sure if that level of money can compete with the big pharma blue pill/ugly triangle SUV/grotesque hamburger ad revenue in the current cable model.
Unless they expand the playoffs, I would imagine the eyeballs that care about the same 4 teams every year would continue to reduce over time. The current product sucks.