Well seince Oddworld is 10 times the size of Earth Im sure we'll be seeing much more differen't varaiteys of Inhabitants (and more Industrial type vehicles).
One thing I can't wait to see is the Big City at the end of the Quintology. I really want to be able to cause havok by just sabatoging little things like taking out the power to a building and watching all the rich Inhabitants that live there freak out.