So I was looking at the updated elder scrolls site and was looking through the screens, when I noticed that the screen in which we see a troll was called "Frost Troll Fight", and the landscape is very snowy.

Now in the official gameplay trailer we see another troll, but this one's fur isn't white, it's more dark gray, and the landscape isn't as snowy as the one in the screen.

Do you think this is a sign of different types of the same kind of enemies being assigned to certain areas? Do you think this will apply to different things as well? Such as mounts, NPC clothing, and other aspects?

that actually sounds great, like a way of making the game more varied and less boring/repetitive.
if that is actually what they are aiming for with the 2 troll screenshots, then i hope to see more of it.

They may have gotten some inspiration from Mart's Monster Mod, which had tons of different variations for monsters. =)

I would love to see some variations in the animals/monsters/NPCs you fight. Like if you're in a snowy area the wolves or bears would have lighter fur or if youre in the forest the wolves or the deer would be more brown. I also want to see the seasons have some relevance in this game. In OB it just shows you what year and season it is with no real regard to what the weather is or how long/short the days are. In winter the frost trolls could be more common and be scarce in the summer