[@Lmpkio] I'd throw in my two cents to say that an arc based on Slattern of the Rift Kaiju as a final boss of that part would be a cool addition. 

[s]Then i could revive that Otachi gijinka i made 7 months ago too, on a side note. :D[/s]

Or maybe an arc where all of the NPC Godzilla's pop up in one big free-for-all for massive kaiju-goodness. 

Perhaps an arc that pushes the conflicting groups to unite against an odd, common enemy for all of them. 

Perhaps eventually to kill tension or such, an anime-obligatory "beach trip" arc could be had to allow for some more non-violent relationships to progress and to have more interaction between the OC's. 

But that's just the stuff off of the top of my head. XD