Honestly it would have never happened. The thing about Stan Lee is that he will try to sell anything and if it fails he just moves on. Everyone remembers the Fantastic Four as Marvel's first new superheroes but everyone forgets Doctor Droom. Just because he saw something and thought he could make a buck on it doesn't mean he had any actually faith in the product. We still love him though.
Added to that live-action superhero programs were a gamble in part since to afford the special effects budgets needed they had to go after more mainstream audiences. Since at the time laws placed limits on how toylines could be marketed towards children, the traditional Japanese route of offsetting costs with toy sales wouldn't work in America.