Orb's right. If you can't create new factions, then M2TW is going to be a very big disappointment for many people looking foward to modding the game. I would be seriously amazed if the developers would even consider limiting the number of possible factions to however many are included in the vanilla game. They must be aware of the popularity of modding in extra factions. Even if the majority of customers don't mod the game, obviously a significant number of us do, and since the developers frequent forums like these, they must realize how many people are expecting that option.