(obviously this is just what I feel would be good to have in the pipeline - feel free to add to it)
1. Obviously, since the Imperial/Stormcloak fighting is still in somewhat full swing still at the end of the game - regardless of the civil war, it does somewhat feel like there is going to be a war with the Thalmor.
Shivering Isles was a large scale mod/DLC in my opinion for Oblivion, and if I were to imagine a similar Mod/DLC for Skyrim, I would imagine something along the lines of XXXX (either the imperials or Stormcloaks) asking the Dragon Born, to go to YYYYY (country of the Thalmor) and Fight ZZZZZ (either the Stormcloaks, or the Thalmor) depending on what side you are currently on.
This seems feasible and likely in a few ways -
1. Similar path style to Shivering Isles - Mania or Dementia -> Stormcloak or Imperial/Thalmor
2. It gets you out of Skyrim altogether, similar to Shivering Isles taking you out of Cyrodil.
3. Would give lots of content for those who loved the battle war scenes from Battle of Whiterun - your essentially fighting the war, on foreign shores etc.
4. And of course- it is a plot hole that Bethesda have yet to fill - so I am expecting some sort of Civil War ending to come in some sort of DLC
2. I dont know how feasible this is, but wouldnt it be so brilliant to actually return to Cyrodil, and see what it looks like after 200 years.
1. The Dark brotherhood being wiped out an all
2. Imperial City under occupation?
3. Talos worship banned.
4. The Akatosh statue still there?