Whoa! Coming Soon unearthed a trove of concept art by comic artist Jock and Andy Diggle for Peter Berg's Dune movie that will never be. Pierre Morel took over as director after Berg left the project, and Morel's going to do his own thing, so sadly this gorgeous art will go unused.
Click on the images for bigger versions or head to Jock's website. (He's got art from other movies there, so it's well worth a visit.)