There's two contrasting elements that don't work together very well. One one hand you have your dude in the middle who is clearly a warfare/soldier/whatever, but the background says more 'Charlie and the Chocolate Factory' or 'Wizard of Oz' and the 'mass effect 2' looks very corporate.

I'd try to rein in the influences a bit, keep it all grunge/apocapyptic style to give it uniformity.