It would be pretty awesome if they were in, would be a nice counterpart to the whole vampire thing, add more depth to the gameplay etc. etc. But I won't care too much if they're not.

And yeah, that would ne just plain rude if they put them in but you couldn't be one HOWEVER, the ultimate slyness would be to have them in the game and you can't be one, and then release a DLC whose primary purpose is to send you down the path of lychanthropy if you so desire, make it the first DLC, release it around Christmas time. That would be pretty awesome actually.