Here's some sample stuff from my second film Cowboys and Aliens (circa 2002). It was intended to be a promo, but time constraints made it necessary to cut tons of good gags to keep the loosest story outline in.
I pitched it to Teletoon and Cartoon Network. Understandably there was no interest in it at the stage it was developed to. I was continuing with sketching it and coming up with ideas, when I read that Columbia Pictures announced it would be making a sci-fi western named... Cowboys and Aliens. Bastards.
The photoshop, and a lot of the BG definition was actually done by my good friend Gabriel Frizzera, however I drew them all. With a Sharpie.