When I look at the concept art for that game, the characters where like humans, and I don't like that at all!!!
It's just too dark for an Oddworld game...
It's kinda Stranger-like, but than a Hulk-version of him...
More is on this site, and these Un-Oddworld-Style drawings are mixed with oddworld-Drawings... Don't know if it's real:
The Ballad of Fangus Kloth