Personally I would love something like that, unfortunately I don't think it will be officially added into the game. Red before he left, had said that part of the reason for the update was for the game to be more natural with habitats and that it didn't make much sense from being in a warm climate and going to a cold one, although if another map was put in between, such as a long winding pathway, then that might be a good way to separate it. Although if something like this were to happen, I doubt it would be for many years to come, so for now we at least can go on custom maps.
