Oh yay, generic ice level. Am I playing some sort of hack and slash game going through all of the always present levels such as the forest and token snow level? Where the hell is this series inspiration. -_- Guess Morrowind was just the freak of the series.
You realize that the locations were set by the lore many years ago when the first games came out right? Cyrodil was supposed to be a typical forest setting with some mountains, Skyrim was created to be a snowy, mountainous wilderness, and Morrowind was a more alien, exotic location with more unique creatures and plant life. There have been maps and descriptions of these locations for years you know. What were the devs to do, say "hey, I have an idea, let's make Skyrim's environment made up of pink grass and giant trees that look like lollipops?"
Besides, they have already stated that the entire game isn't going to take place in the snow. There will still be forests, tundras, mountains, and glaciers. Also, I can't think of a single game that takes place in a mainly snowy environment. I can recall forests, jungles, deserts, and post apocalyptic wastelands being pretty prevalent, but I can't recall a single RPG game based around snow and ice locations.