the problem with the 'league' concept is that track is a 'big meet' sport. No one would care about a bunch of tier 3 people running an 800.
Who would really care if the 'Pac NorWest' team beat the 'New England' team in a dual meet? No one.
The big meets will do well but I don't believe an artificial 'league' will draw more than a few hundred people. Mostly friends and family.
The problems of the sport in the US:
1) No marketable champion sprinter. They're all either not OG gold medalist types or they are cheating sons and daughters of b*^*&)(*s. Or they are both.
So USATF needs to get a clean sprinter to the top step. That is obviously hard, but if the Jamaican program actually stops being an outlaw operation, that could happen. USATF needs to push WADA to get real in Jamaica and other Caribbean countries, even if it has to fund it itself somehow. Nike would probably help, no?
2) Distance events on the track are not going to be popular. There has to be crossover to the roads. Rupp, Lagat, J Simpson, Emma Coburn - get them into road races! Lots and lots of rich people run road races - give them someone to know and cheer for - someone who showed up at the Bix 7 or the Boilermaker to race.
3) East African domination in distance. Until non-East Africans can win races cleanly (Russians andTurks dont count)...the marketing of distance will be very limited even with a road crossover.