What is the location of this warzone? An unnamed Asation moon? I think the planet we can see on the screenshot is Asation due to its swampy nature.
I think we can assume it is any planet/moon once controlled by the Gree, who are sort of "squid-like" and "amphibious-looking". Moon of Asation does not make much sense, because why construct a massive power-hungry device like a hypergate on moon of planet which already has one?