I like it. I can see where the SC2 influence comes in. It reminds me of the preview where they showed the guy getting bolted into the armor. Just looking at it, you can get the feeling that there is no getting out of that. The facelessness of the helmet has a slightly foreboding feeling about it with the light kind of giving the idea of sentience behind the surface.
But the posture sort of asks, how much more of the man is left in the machine?
The arc to the back shows the stress but I can't imagine a person inside laboring from the look of it. More the memories of exertions long forgotten. I like it, definetly going to brood on this for some inspiration for times to come.