i was just thinking
since this is tamriel and magic is everywere dlc can be anything. example of possible dlc would be the ability to relive threw magic epic battles from the past like the nord revolt against the dragons this could in turn open up new skill lines involving shouts. as sort of an achievement skill line.....
this is of course something that would come after or in between them adding the other area's of tamriel and they even have 3 continents they can play with if they so choose. or is it 4.... red guard homeland was sunk in the see i think.
if anyone else has any idea's please post here maybe zenimax will think on some of ur idea's and implement them

It's an overused cliche at this point. But as you noted, there is a ton of other stuff to put in first
Not only all those areas and the rest of the guilds, but dueling, housing, all the weapon types and associated skill lines that people have been asking for, and maybe some new classes.
All lore is new lore the first time it appears in a game. Not saying they WILL, but of course they CAN.