Did you make the wallpaper used in it? If so then the only other copyrights you'd have to deal with are from the people who own the rights to the movie. I've seen the wallpaper used in this a few times via the internet, and deviantART over the years, but I don't know who made it.
Oh okay, then I would find the authors of each piece, and ask them for permission to sell it as a poster. I wasn't making an accusation, I was just asking. The gold look to it, is repeatable without using textures in Photoshop. I've done it a few times.