Honestly though, except for the first two black and white Godzilla films (when he was initially named Gojira); the film series in general has never taken itself very seriously.
First off, "Gojira" and "Godzilla" are just different transliterations of the same Japanese syllables. In the '50s, the preferred romanization scheme rendered them as go-dzi-la, and a second L was added for aesthetics or clarity (and probably because the name was partially derived from "gorilla"). In the more modern romanization scheme, those same three syllables are rendered as go-ji-ra. But they're both pronounced exactly the same in Japanese, about halfway between the two spellings with the syllables stressed about equally. (Although when characters in the Japanese films speak English, or when signs and graphics are printed in English, they almost always use the spelling "Godzilla" and the American pronunciation of the name.)
Second, most of the movies from the past three decades have taken Godzilla seriously. The '54 original was the most serious and thought-provoking, a powerful allegory about the ethics and consequences of weapons of mass destruction; the '55 sequel, by contrast, was just a rather dull disaster movie with no deeper message. The later movies in the '60s and '70s became more aimed at children and increasingly goofy for the most part. But the 1984 reboot was very serious, an allegory on the nuclear brinksmanship of the superpowers and the frustration of other nations like Japan who were caught in the middle. The remaining films of the '80s and '90s -- the Heisei era -- were mostly fairly serious, with the exception of the abysmal
Godzilla vs. SpaceGodzilla, which was rather a throwback to the '70s. The Millennium-era films that began in 1999 tended to be pretty serious and dark. The namesake film
Godzilla 2000: Millennium had a very nihilistic ending. Two films later, the movie nicknamed
GMK was a dark and biting allegory on modern Japanese culture's whitewashing of the crimes of Imperial Japan before and during WWII, with Godzilla representing the souls of the Imperial war machine's victims come back to inflict vengeance on Japan. It was also, in parallel, a satire of the way Godzilla himself had come to be seen as cuddly and harmless, and a return of the character to his most malevolent form. The whole Millennium series was pretty serious in tone except for
Final Wars, which was full-on gonzo crazy and campy.
Still, I hope this new series of Japanese Godzilla films (and it will be a series of films, like the other Japanese Godzilla revivals) will make their way into the Western market in some form.
I definitely agree with this.