Deathwing is by far my favorite character from World of Warcraft (Beating out Kel'thuzad and the Lich King).
I don't know if I'd ever get a Sylvanas drawing done, to be honest. There's alot of projects that I've wanted to do from WoW (My friends and my character) and currently I'm trying to just do anything art related. I'm in the current process of scratching a car which is taking me forever just because of college. It also doesn't help that I quit WoW back in july lol. So I can't promise on any drawing whatsoever.
The only thing I can say is if you have a favorite piece of Blizzard art of her (official, not someone's fanart), then I could scratch it onto scratchboard for you.