The Gmork - In-progress sketch

This is my in-progress concept sketch of the Gmork for one of my Master's modules. I started off with various rough silhouettes, narrowing it down to the silhouettes that most caught my fancy, then modifyed them some more. I originally want him to look plenty like a normal black wolf, but with a somewhat "gangly" feel without sacrificing muscle mass and the feel of weight. 

His face in the movie was horrifying, and I remember always being intrigued by his extra set of canines, so I plan to have him keep a unnatral set of teeth. I'm planning to add some cuts and scars as well, to give him a bit less healthy look, perhaps with an eye infection to give him a nastier appearance. 

Constructive feedback and thoughts are always welcome, and if you have any input or comments, please don't be afraid to do so! I always appreciate feedback!