I've seen that and didn't report on it because I believe many people are taking it out of context. I think it's more likely Wingard is talking about human characters from Godzilla 2 in Godzilla vs. Kong, especially since some actors are rumored to be contractually obligated to multiple movies.
It's also likely Kong is "constantly under attack" from other humans and Godzilla. It's not specified what is attacking him.
And finally there's the context of the, "lots of monsters going crazy on each other," line. Some people are reading it as, "LOTS OF MONSTERS going crazy on each other," as if there will be a bunch of monsters fighting one another. But I think what Wingard meant was, "lots of MONSTERS GOING CRAZY ON EACH OTHER," meaning there's lots of monster action--Perhaps just Godzilla and Kong going crazy on each other throughout in the film.
I could be wrong, but this isn't anything to blow out of proportion yet. It's certainly not confirmation that there will be other monsters in the movie.
"'Nostalgic' does not equal 'good,' and 'standards' does not equal 'elitism.'" "Being offended is inevitable. Living offended is your choice."
