In 1977, NBC broadcast nationally and in prime time the one and only Japanese Godzilla film ever shown this way, Godzilla vs. Megalon (1973). Since the film had a goofy reputation, bumpers were filmed featuring Saturday Night Live actor and comedian John Belushi in a Godzilla suit, starting with his snarky (though played straight for the character) remarks about the film and franchise, and ending with him trashing his chair and then biting down on the movie reels. Belushi had previously played Godzilla in an SNL skit with Gilda Radner as "Baba Wawa" (a broad parody of Barbara Walters), treated as though the fictional monster were an actor in his own films. Given the amount of classic horror/monster parodies on the first five years of SNL, it seems possible that Belushi was a Godzilla fan. These bumpers were only shown with that original broadcast, which was only rerun once or twice soon after the first one, and have not been seen since. It is not known if they even exist any longer.
In the course of the promos/bumpers, Belushi ends up repeating a common Godzilla film fallacy, promising that Godzilla vs. Megalon will not be like his other films. Among the ones he cites is "Godzilla Vs. Rodan." While the pteranodon-like Kaiju and Godzilla have fought several times, there has never been a film by this title, making it seem like a "lost Godzilla film" all by itself.