Thanks for your comments, guys.
Atto: Looking very good. Love the starkness of the design (the darkness of space against the rich warm color of Arrakis and the figure). Just watch that the dark area of the planet doesn't coincide with the darker back of his head. You want the portrait to pop, so keep an eye on the shapes and position of light against other shapes (which is why I think version 2 of the ones you posted works better). Frankly, when I look at what you are doing, I could totally see it on a bookshelf at Barnes & Noble.
I'm moving fast on mine because I have some business travel in the latter half of the month, so I'm compressing my finish timeline (if I don't, I'll probably not finish). I'm hoping to be done some time mid month (before I have to go away).
Here an update (WIP02): Used Deckard's coat as a container to add Rachael's portrait. Used one of the still shots from the movie as a reference for her (there's tons of them). I may or may not do additional detailing on the figures depending on the time I have. I may do away with the split in Deckard's coat in the back. I added it to break up the space, but with Rachael there it looks like a comic speech bubble. I'll see how it reads when I add the background.
I think the toughest part of this will be the city background and the lettering design of the title. I've been looking at a lot of the paperbacks published in the 1960's for ideas.