Well I got to thinking, whatever, and wherever this new dlc will be we are guaranteed a couple of things.
1. New fantastic(literally) quest that may even have more spice than the original games quest.
2. More Creatures, Enemies. With every bethesda dlc so far, we have had new interesting enemies added into the game. All with new interesting animations. These new enemies and animations can be used for modders too. For instance, lets say bethesda added snakes in the dlc, well now modders can take the animations for snakes and now make all kinds of snakes.
3. New Weapons/Armor. I love modders armors and weapons but nobody does it like bethesda so I'm looking forward to seeing some new armor and weapons introduced.
4. New interesting characters. It's always good to see brand new characters filled with personality. May it be a crazy sadistic villian, or a hilarious character. Its still cool to interact with them and see there stories.
5. New Gameplay effects. Well basically anything added that was not in the original game. Maybe new animations for the character to learn. Or new traps, hazardous environments? New powers or abilities. New Visual effects. Anything.
What would you like to see?
1. Fantastic quests? With Bethesda? Pfft, no.

2. Oh but here's the thing with Bethesda, if they do a DLC it will probably take place in an isolated new area with isolated new creatures, so yeah, new creatures all right, just not to the main game's area, Skyrim.
3. Ah, yes. Another two-handed hammer that does exactly what the others do but with a different paintjob. Not much to be excited for. As for armors? That is something to look forward to if you care about your characters appearance.
4. Possible, but since I've seen Skyrim's design I predict one character will stand out while the rest will be boring forgetable characters with little interaction possibilities.
5. I wouldn't get my hopes up. Fallout 3 got perks, Punga Fruit and those alien biogels but not a whole lot else to change things up in the main game. And I do not consider the Punga Trip in Point Lookout to add to the "main game" as I cannot get high off my ass in the Capital Wasteland through Punga.