PA, I love your idea of the Mudokons becoming more gungho, which would lead to war, but I'm not sure about your idea about it being purely the Mudokons against the Magog Cartel. Since the destruction of Vykkers Labs, the Industrial economy has been collapsing, as shown by the special Angelic newspaper at the end of MO, meaning all the industrial races want to stop rebellion, although I imagine the families are segregated enough to only really care when their own facilities have come under attack. What's more, we haven't seen what other races are being suppresed by industrial forces (I haven't seen the Crimbo Card yet, I always save such topics till last
).
Hence there could be any number of races involved, but you are right in that it does seem most likely the Magog Cartel has the greatest army force, and that the Mudokons would head the native retaliation. I can then picture Abe trying desperately to put an end to the violence to find a more peaceful solution, although I have no idea why.
I was thinking yesterday about an Oddworld war, and I decided while it would definitely take place towards the end of the Quintology (and it's just occured to me that it could be started by the Mudokons - indicative of their becoming more gungho (sorry for stealing your word, PA, but it's great), and also being a chance for us to discover their war-like Adviser Era), the final game would be better a final resolution to the story - a mobsta/Mafia story. I would love that so much.