Hm, I'd say he's too binary-shaded here, and your pose looks way too similar to some of the promotional art.
The former makes him ill-suited to the background, and the latter makes him look cut-and-pasted into the scene.
Try to revise the pose a bit to fit the background more, and tweak the shading to be less harsh. Even just changing that one color could help with that, but I encourage you to make another pass over it to try and refine things!