If we get spears, I am going to make a mod that adds Muatra.

If they give us spears, I really hope that both Muatra and the Spear of Bitter Mercy will be in !
Many people have voiced against it but I would seriously love to visit Solstheim and see what has changed in the 200 year absensce. I Loaded up bloodmoon for the first time only after playing skyrim and I absolutely loved it.
We may have been there before... but its a completely different place now. Populated with the refugees of morrowind (and hopefully still a large amount of werewolves... though they wouldn't be the Ferocious bloodmoon variety)
Speaking of which. I know we already have the companions and hircines ring (where you can actually see the bloodmoon) But Solstheim would be the perfect place to really beef up the lycanthropy part of the game.
Add more lore, more quests (a place to freaking see them in the wild for once!) and ways to hone your hunting skills (introduction of werewolf perks, maybe taught to you by an old werewolf who has hunted on the island for a very long time.)
But I'm happy whatever it is

Moreover, Solstheim would allow us to meet another kind of Spriggans, and to find Stalhrim ! Since you're about lycanthropy, I really hope they'll give us werebears.
There's one more for your list:
- Roscrea
If I may add my two cents to your lists, other places that are likely due to their nearness would be
-http://uesp.net/wiki/Lore:The_Exodus
-The http://uesp.net/wiki/Lore:36_Lessons_of_Vivec,_Sermon_36 of the Dreughs
-Borderline areas : Blacklight, the Pale Pass, http://uesp.net/wiki/Lore:The_Song_of_Pelinal,_v_4, http://uesp.net/wiki/Shadowkey:Snowline, Fearfrost, the Temple of Twilight, Dragon Fields, http://uesp.net/wiki/Lore:Dragonstar...
Also, I think the Island of Stirk would make sense, for the following reasons :
1. This is possibly, due to its location, a place where huge tensions occur between the Thalmor and the Empire. As such, a DLC there could prepare the huge confrontation foreshadowed in the game, without leading to an end of it, since this stuff would obviously deserve at leats a whole game.
2. Since it is an island, this is an easily limited area to give to the players.
3. Maybe cyrodiilic river dragons are close enough to come there.
So maybe we could go there by teleportation, as it happens for Tribunal?