What if some of the top players in the N…

What if some of the top players in the NFL just quit the league and decided to play for the UFL. The UFL team could break the bank and risk signing a superstar with the hopes that it would increase attendance? Then if attendance goes up, they can sign more good players? Just daydreaming here, but defecting to another league would be one (very risky) way the players could stick it to the owners, right?