While browsing through the website of Chris Sanders, I found a link to Eric Tan's website. He created the terrific X-Men poster you see above as well as these Wall-e postcards and posters for The Incredibles. Sanders is no slouch himself, take a look at this illustration, reminiscent of Lilo & Stitch.
Oh, I started browsing Sanders' website in the first place because I learned he'd been dumped from the Disney film American Dog. Too bad, Lilo & Stitch is easily my favorite Disney cartoon.