This is very rough and sketchy, and there are things I couldn't get to match my mental image (the arms/forelegs in particular), but I wanted to try to sketch this out whilst it was still in my head.

Wendigo as horror-type monsters interests me...this creature that's just viscerally terrifying and wrong, with part of the horror being that it was once human and has become something completely inhuman that shouldn't exist, and you could become one yourself. I probably didn't word that right, but still. It's a neat scary idea.

Anyway, this is more or less what my take on a wendigo would look like. Was kinda going for a mixture of wolf and bear, with a bit of deer in the face and antlers. Usually it walks on its knuckles and is somewhere around 8 feet tall at the shoulder, and swings from its powerful arms can knock down trees. And although you can't see it since I've not coloured it, it'd be light greyish-blue with a white face and glowing icy-blue eyes.