User blog comment:Zelron/The Elder Scrolls V: Dragonborn rumors (Imbedded deep the secrets sleep)/@comment-69.235.12.208-20121022034255

I'm guessing that what they might do is add the actual physical DLC things into Skyrim via patch, but prevent entrance into the new area, then through downloading the DLC, it'll unlock the DLC, by adding method's of entering said new area