Comments of chapter undefined of Reincarnated into a world of Pacific Rim & Godzilla as a kaiju

Hey question can I don't know Ghidorah come back but when he's in his Mecha knock off body of Godzilla or Annubis, he begs to change his ways and not be killed and regenerate rest of his body to help fight the Kaiju since he knows he doesn't stand a chance against them? Also can the big bad be a alien Godzilla villain like Desghidorah aka Ghidorah's little brother who got kidnapped and joined their ranks and became King of them and they sent their Kaiju after them? Also can't the two king of the monsters help humanity stop polluting the Earth or Terra in this case?