One of the favorite thing i loved about Marrowind was fighting and being a werewolf in that game. I can only hope that they add them in for a future major DLC. What would make it even better would being able to customize the way your werewolf character looks and everything like pretty much a brand new race u could play as or take an existing character to contract the disease to become one. Idk id like it to be more than just a disease like the vampires if anything. Something u could play as without having to worry about being butchered in town for just being one. Say u go on a quest where u could get diplomatic immunity to walk around as one without getting your head loped off lol. If anything i think they would look amazing in character customization that Skyrim presently has.
Another big thing id like to see and i know everyone has probably said it already in numerous post is being able to sever limbs and to be able to shatter the skull of ur opponents. Was really hopping they would have put that in granted FO3/NV was a completely diffrent game from this i can see it a little in this at least with random deaths of NPCs u slay. I would just like to fully be able to take control of how i want to end that persons life. Like sometimes they would be hunched down on the ground gasping for breath and id be just itching to want to chop there head off or drive a sword through there torso in a gory fashion lol. Thats minor but it would be nice.
The main thing i would LOVE to see is the werewolves come back latter on

And no iv never watched any of the Twilight movies if any of u are getting that feeling not a one. Kind of disgusted by sparkling vampires anyways lol.