For the last two Elder Scrolls titles Bethesda has chosen the safest option each time. They chose the most familiar and easier to appeal to a mass-audience location. This is incredibly sad because part of the reason why Morrowind is so great is due to how unfamiliar and alien the setting is.
Yeah, I get the feeling that Skyrim sold so much that they might be less willing to take risks that might affect future sales in the mainline franchise.
It will be interesting how they deal with the Aldmeri situation though.