I remember reading something about OI thinking of including an arctic-type level in either AO or MO (sorry I forget these things) but I think they scratched it (at least for the games released so far) because they said it took too much memory or they didn't have a good idea of how to incorperate it with the story line. I wish I could remember where I saw this.
The Meech idea Lindsey came up with would go perfect with this in the quintology KintoKid. They could indeed do something where they have Abe discover some sort of hidden secret dealing with the Meech and the Vykkers or the Glukkons. I could see the Almighty Raison telling Abe and Munch that they must travel far north to find the last remaining Meech frozen in a cave and guarded by Glukkons and Vykkers for some purpose. They must find it to bring back the species. And perhaps the Glukkons could be a different species of Glukkon this time like one of the other members of the octigi family.
