How about pack dynamics? A secret lot or perhaps a secret neighborhood for members of packs that could be integrated into the werewolf pack, perhaps that would involve the Wolff family from the sims 3 Supernatural being one pack with Pappy being the Alpha. You the player could build your own pack (random werewolf npcs can be called loners), integrate yourself into a premade pack, or there could be the possibility to combine packs (like the packs battling each other then the victor takes control of the opponent's pack). Perhaps with pack dynamics there could also be rules and guidelines that can be changed such as how loners can join the pack, who has what task (thinking more like what certain members role will be like hunter or pup sitter), and also how they view the other races like vampires and humans.
