
Below zero was an amazing concept and the possibilites for the artic variations of creatures were awesome, personally i loved the fauna in bz alot more than the first game and it had some of the coolest leviathans with the chelicerate and ice worm, adding later on either an artic/sub-zero area to the map and continuing to use old scrapped concepts as new creatures here, such as the artic reaper and reefback could be made into really cool new creatures with ice smashing capabilities
I agree it would be neat, but much later, DLC perhaps with some sort of either quick travel or loading screen travel to visit different parts of the planet yes, but again, later.. much later