I agree with most of the crits given. Really cool model. The number of small details and coming off really noisey. I'd pick some shapes and make them larger. IE the optical device/tubes on the helm, the vents/paneling on the shoulders. A couple more looks to smooth out the shoulders would be cool also.
Also you poses could use some work, they're really straight and don't really help define the shapes you've created.
Dump the background. It's just creating extra background noise. It's pretty recognizable as a WC3 character, no need to push the obvious in the background.
Outside of that again, really cool model and idea. Just needs some fine tuning imo.