Also, considering this heavily focuses on indie comic characters, there is one character I would like to add in. Now, he's technically from a certain tokusatsu series - but this version of him comes from a manga several years ago that has recently been announced to make it into a TV series/movie. While I know you guys usually don't accept Manga characters (save for Sailor Moon) I can easily modify this character to fit within this sort of realm.

And who am I talking about? 

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Ultraman!
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Also regarding the Big G himself, I also would like to introduce Dr. Serizawa from the recent Monsterverse series (he's also been in the Godzilla 2014 prequel comic Godzilla: Awakening - and presumably the upcoming Godzilla: Aftershock comic - so he technically counts) and maybe even Monarch as well (seen/mentioned also in the Kong: Skull Island Comics as well).

Edit: Last question - which incarnation of Godzilla are we using/what he looks like? The original 1954/Showa era? IDW's incarnations like those in either: Rulers Of Earth? The Half-Century War? Cataclysm? Gangsters and Golliaths? Or even Legendary Godzilla based off said comics I mentioned?