Two big bad monsters and multiple minor monsters?

Unless: -There's the Main Villain set up throughout the film and shows up at the climax to fight Godzilla -Like Kamacuras and Meganulas, there are a swarm of creatures against Godzilla thorughout the film. If Toho counted a Monster Icon for all the Kamacuras, why can't Legendary do with this one?

Hmmmmm not exactly what I meant. I mean the minor bug monsters are way to big to be a swarm, the minor bug monster was said to be big enough to attack helicopters and had a frill like a lizard(godzilla DNA mixed with bug DNA or parasites that got attached to Godzilla cells that fell off godzilla's body and mutated into bug/reptile like monsters?