After the rather mixed reception of Godzilla: The Game, it seemed rather unlikely that there would be a sequel. However, it managed to get a decent amount of profit so a sequel is entirely possible.
What do you want out of a possible sequel that fixes most of the issues? Personally, I want more mission objectives so it doesn't feel like you're playing the same first hour over and over again, as well as better character balancing (admit it, SpaceGodzilla is SpaceGarbage-tier, even though he should be stronger). Among other things.