while I certainly wouldn't mind dawnguard or vigilants, what I really wanna see are more argonians. I've always been fascinated by them, if only because they seem to have the least amount of species lore (they show up in stories as characters but so rarely is the story about their history, culture, location) - ESO has done an interesting job of expanding what little we know about the hist trees, but I'd like to see more
besides the dark scales or whatever their assassin league is called...oooh, wait...
what was the name of the brotherhood that freed slaves in morrowind?...that'd be an awesome guild line...