I thought I made this clear.
No, you did not. Here's what you said:
Indeed, that's implicit in the film itself -- the new creature is given the name Godzilla because a Japanese fisherman saw it and thought it was Godzilla, which suggests that the real Godzilla already existed as a separate creature.
I am not saying that the film itself intended to assert the prior existence of real kaiju.
Then
implicit is clearly not the right word to use, because that is suggesting that the movie
did imply that these creatures had existed before, when it did not.
Your whole point is based on a misinterpretation of the name by an American reporter quoting a Japanese fisherman who's just describing the creature's unique features for the first time, not citing other creatures from memory. And was this guy involved in the coverup the whole time? Why wouldn't he go into more detail once he calmed down, like "It's like that monster that destroyed Tokyo in 1954 that they made me sign a non-disclosure agreement about, which is kind of a moot point now."
I am saying that it allows for us as fans to interpret it in that way. I'm talking "headcanon" here. It's a creative exercise in reconciling the film with the "real" Godzilla. Of course it's not a perfect theory, because it's not what the filmmakers intended. But as a fan retcon, it's not that much of a stretch.
It's a HUGE stretch. It's fine to have as your headcanon (I do the same thing with trying to combine movies like this and
Cloverfield and
Pacific Rim and others for fun, but I don't think the movies imply that they're connected), but that's not the way you framed it before I replied to you. You were clearly trying to suggest that it was implied by the film itself, when everything in the film overwhelmingly argues for this being an unprecedented phenomenon.
After all, GMK itself does implicitly suggest that the Tri-Star movie took place in its continuity, even if it's just as an in-joke. I'm just saying that the Tri-Star movie itself does somewhat allow for that interpretation, without the need to squint too much. And since GMK is "real" Godzilla while the Tri-Star film was a weak imitation, I would rather follow GMK's lead.
That's fine. But that's not what you said above, which was my objection.
Why is everyone so incredulous at the idea of a "dinosaur" (which is what they called it at first) roaming the streets of New York if Tokyo has repeatedly been the victim of these kinds of attacks before?
Ahh, but you see, GMK is set in a version of the universe where Godzilla has not been seen since 1954, and where the events of that original attack on Tokyo were largely covered up by the Japanese government in order to avoid making the recently-created Self-Defense Force look bad. So in that continuity, Godzilla was not very well remembered, considered a legend by many. In fact, in GMK, when the monster Barugon first appears, it is mistaken for Godzilla by bystanders.
I already addressed this in my post.
Even in a pre-internet world the existence of a giant lizard monster coming out of the sea and laying waste to a city the size of Tokyo could not be "covered up." Post-war Japan was not the Soviet Union with total control over all media, and even
major events they tried to cover up that took place out on the remote desert steppe of Kazakhstan leaked out eventually.
Likewise with China. Did the millions of residents in Tokyo and foreigners stationed or visiting there all decide to participate in the coverup and then not come forward when a new giant lizard monster started attacking New York?
The
US military and government had extensive bases and facilities in Japan and the Tokyo area in 1954. Heck, the US occupation of Japan only officially ended two years earlier in 1952. The Japanese couldn't keep the event secret from people who could see it with their own eyes. Which brings up the question of why the US military needed advice from the "worm guy" on whether radiation can enlarge animal life and hadn't ever developed weapons or contingency plans to deal with the possible return of these kinds of creatures in the intervening 40+ years.