While the NFL is in need of a developmental league, and it would be nice if there was a viable alternative to college for players who just don’t want to go that route, it’s hard to see this generating enough revenue to survive.
There’s not much reason to think a large number of fans will pay attention to this at a time when NFL training camps are starting up, and it looks like a much worse overall deal than a college scholarship, which includes living expenses and a stipend, free training and promotion and of course the opportunity to earn a four-year degree along with the general benefits that affords.
The compensation in this league wouldn’t seem to be enough to entice many, if any, athletes who find the idea of college in any way tolerable and can stay eligible.
It would be great for the group that doesn’t fit that description to have another option, but it’s hard to see this succeeding as it has been proposed.
So the idea’s most likely impact is to provide one more push to the NFL to start its own supplemental league (perhaps in the spring?) to give the hundreds of players on the cusp of making its 53-man rosters another chance to develop their games and hopefully help the on-field product improve by providing more reps for young players who are good enough to make the final cuts.