This is just a cool idea I had that any experienced modder could have some fun with. We know that there are werevultures in Valenwood, but we don't really know a whole lot else about them. I thought it'd be fun, and very possible (though I'm guessing difficult) to actually put werevultures, and of course the ability to become a werevulture, into the game. My idea to make one is sort of combining the vampire lord with aspects of the hagraven, like their talons. Doing that along with a couple other changes, such as giving them feathers, making the wings more bird-like, and changing their faces and I think one could make a pretty convincing werevulture. From there, all you'd have to do is give them werevulture abilities rather than vampire lord abilities.
If I had any experience with making mods this would be the first thing I'd do. It sounds like it'd be fun to work on, and has a lot of possibilities. For example, the only thing we know about werevultures is that they're only found in Valenwood. So what would they be doing in Skyrim? One could potentially not only throw werevultures into the game, but an entire storyline if they wish.
I'm not requesting it, just throwing it out there to anyone with experience who likes the idea.