I'm personally very interested in the lore behind the Seven Human Kingdoms of Azeroth and I was kinda sad to see that they were given next to no recognition during Vanilla, TBC and WOTLK.
Now, with the advent of Cataclysm and the re-rise of Gilneas, I'm kinda hoping that we'll see similar rebirths in the other human nations.
Obviously, it's going to be hard for the Kingdom of Lordaeron to take back it's rightful capital city - in part due to the obvious (Forsaken sits on that bitch these days) and that, well, there's no one left in the royal family of Lordaeron to claim it. But the smaller nations, such as Alterac and Arathor deserve some fresh resurrection.
Stromgarde is a beautiful fortress that sits on one of the nicest zones in the game - I would love to see the House of Arathor active again.
Anyway, to my discussion-starter - Are any of you interested in the re-birth of old nations, such as Arathor and Alterac - or even the implementation of existing ones - such as Kul'tiras? Don't limit your chain of thought to human nations though, it'd be fun to see what people would wanna see from other perspectives.