

Just so you guys know I'm asking about 2019 Ghidorah specifically, not any others.

I mainly think he goes to earth and other planets to absorb all their radiation and kills all the other titans as well. After terraforming and making it lifeless, he goes dormant for a while and then reawakes to find another planet.
But thats a guess i have, its purely conjectural, i have no evidence.

There was a theory that Ghidorah was trying to get to the Hollow Earth energy source, which is why he was in Antarctica. He was trying to enter the Hollow Earth through the passage way before Godzilla stopped him.

That would make sense, but what's the point? Just absorb planets' energy and kill everything on them?

That makes more sense. Thats interesting

xilens
or venusians
or the vortech
or the m space hunter nebulas
or the millenials
or the exif
or the kilaaks
or the black hole planet 3,s
or the Bilusaludo
or the cryogs
or the meteor from godzilla vs the space monster
or people from the future
or spacegodzilla
or the ancient order of ghidorahs/gidrahs/giderah,s
dang

Pairan maybe?

Wait did you include millenials? aliens right, not the generation?

That would be cool if we get a Legendary version of the Xiliens

hinikunagoji,
millenials as in orga, the rock, space ship thingie and mr. bad cgi squid