Since we have no idea what college sports are going to look like in a few years, I wouldn't be shocked if we see some type of "understanding" or direct agreement to make the top college basketball conferences an NBA minor league. It looks like the players are going to be deemed employees. NIL is stupid and will eventually just be a supplement to the schools paying the players directly.
What will it look like? I have no idea. Maybe the NBA sponsors teams (NBA as a league sponsoring conferences, not individual teams) or even takes ownership positions in all of the NCAA P2 (or 3, 4, 5) teams. They provide training and lots of money, and in return they get control of the player development (as well as revenue stream). Transfers would be tied to real contracts that players sign with colleges and they'd move eligibility to 6 years or so (after that, just go abroad). It would look more like the international soccer regime where teams get paid for their players moving on or up.
This would be horrible for the sport we love (college basketball), but there are a few things we know: i) The greed of college sports has no bounds, ii) the NBA has super deep pockets, iii) the NBA is admitting that their minor league might lose to college basketball and they won't take that without throwing some haymakers.