IMO the only DLC that sounds good from what you listed is the last one, I want the Dwemer to remain a mystery and am worried that too much focus will take that away, already had my fill of Snow Elves and the origins of the Nords just sounds pointless to me.
Hard to say whether this is false or real but I'm going to say it's all fake (fingers crossed), I'd like the Thalmor to be something that is carried on in the next TES game but wouldn't mind a permanent end to the civil war DLC.