That road in the southeast corner leads to Morrowind. I believe there's another road somewhere that leads to Cyrodill. I have only found the Morrowind road myself.
As for DLC, I initially thought the Isle of Artaeum would be a good place to visit. Judging by the book, A Fragment on Artaeum, it sounds like a beautiful place. As for content there, it's home to the Psijic Order, so that would lead to doing quests and stuff for them possibly.
Maybe, probably not though, the Fragment has been there since Daggerfall I believe, possibly only morrowind though. It would make sense given how you basically become a Psijic through the mage quest.
Another possibility is Azura's realm, Moonshadow (I think that's the name, don't quote me). It also sounds beautiful and for some reason I feel like there's a chance of it happening. However, the devs of Skyrim stated the expansion/DLC won't be as big as Shivering Isles I think, so a Daedric realm might be too big to do. Who knows though.
God no, that would be a complete and direct violation of the lore, for Azura's realm is the realm of dreams, and of the time between dawn and dusk, it's not for mortals to inhabit. The ones who do, are stuck there for eternity, and stricken blind from the beauty of it.
From what I understand though, Bethesda never hints at DLC in their games, it's always something far removed from the main game. They could have done it differently for Skyrim, but I haven't found anything that would lead me to believe that.
I personally would be so incredibly stoked to return to Morrowind, even if it's just the southwestern corner of Morrowind. I'm not sure what kind of content you would find, since Red Mountain blew up and the Argonians invaded. But it would be cool nonetheless.
Eh, south west, is Typically Dres and Indoril territory, so Slave owners and Hlallu allies.
I also hope the DLC adds new things for characters above level 50. New armors, new gold sinks (I hope there is a castle that costs 100,000 gold or something), new enemy types, etc. I'm sure I won't be disappointed.
While I agree gold sinks are a good thing, make the castle be something like Raven Rock and you are approaching good gameplay.
Whatever the DLC is, I'm sure it will be amazing and will probably blow my mind. I can't wait.
If you say so.
Also, Harle, their toolset makes it incredibly simple to do outdoor scenes, having played with every iteration of it since Morrowind, and having played with the NWN and NWN2 toolsets I'd call the Betheda one better for making general content with, the NWN one makes it easier to do quests and actual RPG content.
Presently what it would take to make me purchase the DLC would be a decently sized dungeon, and I do mean that in the old school sense, IE at least 5 levels, expansive with multiple paths to transverse it, and a unique visual flair.
There were roughly 4 types of dungeons in skyrim, snow caves, caves, dwemer ruins and nord ruins. Almost all of them have a secret passage back to the front of the dungeon and all of them are basically a linear straight lines so much so that as I was playing it I took to calling them COMBAT HALLWAYS. Dwemer ruins didn't even look as cool as they did in morrowind, and just looked like modified ayelied ruins from Oblivion.
I did like the look of the underdark stand-in, Blackreach, even if it was just an upscaled cave meshe with glowy mushrooms sticking out of it. It made me think about what could have been though. Had they made each dungeon that complex and visually interesting. It was seriously the ONLY good dungeon in the game.
