User blog comment:Kacj321/Entire Tamriel Landmass built into Skyrim/@comment-89.134.77.86-20111122173452

I personally don't think that they will be placed in a DLC. Another explanation might be that you can see them on absolutely high-end machines, with ultra top graphics. It would feel kinda bad if you climb to the southernmost mountaintop in Skyrim, and you would be seeing no landscape at all. Chech if Black Marsh for example is there; THAT would be overkill, not Cyrodiil or the other neighbor provinces.