The argument could be made that Marvel Studios did, in fact, save Captain America when they re-acquired the film rights to the iconic character, thus allowing 2011's Captain America: The First Avenger and its hugely successful sequels to come into existence.
After all, before Marvel stepped in, the only film exposure Steve Rogers had was the laughably terrible 1990 film, simply titled Captain America. The movie was a lame, campy, poorly-acted mess that would Adam West's Batman cringe, not to mention starring J.D. Salinger's son of all people.
To add insult to injury, it only made back 0.1% of its $10 million budget. However, while absolutely abysmal, that film was likely forgotten by most people just as quickly as it arrived, let alone twenty years after the fact.
Marvel did right the wrong by ultimately doing one of their oldest heroes the justice he deserves. However, you'd be forgiven if you thought that The First Avenger was the first Captain America film ever made.