I think you need to make your sig smaller, cause it has alot of empty space :)
I like the concept though :D

good placement of the render and very suitable background but try taking the opacity down on the gloss affect..... takes a lot of attention from the main part...... otherwise very good job....... try putting a slight bit more detail though..... maybe as a base layer have a destroyed city with soft light or something on it to go with the theme of killzone a little more.........

will give an effect something like this