Well not that I have a stereo typed mind about game level design, but woulnd't be awesome to have an ice-environment or a factory into this place for the fan-game?
Maybe the Glukkons are trying to get the DNA of frozen spezies for new profit. The backgrounds could show this species in the frozen ice and 'cause youre making an Exoddus-Mod, we would have the right Mudokon sprites from Necrum Mines, which are trying to fetch the species out of the ice.