I think the problem was there that wasn't the time with the USFL wounds still pretty fresh. Besides, as I've said before the NFL will back both to some level as a way of becoming their own super league of sorts, which has the added benefit of cutting off a LIV-style rival, even though it (potential rival) will actually have less chance than the one that went against the Premier League.
On a somewhat-related note, Jeff Pearlman was spouting BS (because ORANGEMANSTILLBAD) about how USFL1.0 wasn't trying to be a competitor to the NFL, which he'd have been right if he meant the original Dixon plan but no--that doesn't create clicks you know. Let's see: signing Herschel Walker because juniors couldn't go to the NFL at that time, drafting Dan Marino (didn't sign) and Jim Kelly (did), signing Doug Williams in the midst of a contract dispute, negotiating with Walter Payton the year before he set the rushing record. Yep, no competition there (I think I've found the next Florio).................................