Dude, I absolutely love it. Very nice selection for the background. I love the whole, dark-cloud swirling look. It really brings out Revan in the foregroud but not too much. It looks like he is really standing there.
Very nice color selections for Revan's costume. Black with dark-red for the cloak, and dark-blue for the pants. And a scar on the cheek. Or is that a tattoo? It looks like something a Dark Lord would wear. Not flashy, but intimidating.
The only thing I'd change is his eyes. I'd have Revan looking at us. It makes him look more menacing.
Like I said before, I love it. Great work. Wish I had the skills.