This stage isn't done yet but you can get the idea of what I am doing. At this point I am trying to establish the lights and darks of the piece, the values. The heavy lifting of the entire process will be taken care of here. I'm using a main light source in front of and below the characters. Secondary light will be coming from behind and giving a glow to the outer edges of some of the characters. I have also added the logo and roughed in some of the extra movie poster copy.

Still have a ways to go. :)