What do you anticipate the system requirements will be for OWT?
Also, the economic model should be as deep and dynamic as possible. Simplicity may draw more people in, but the hard core folks will be disapointed.
And looking back to the fall of Capitalism II, make sure the economic models are bug free, because if they are broken, the game will crash and burn....
I've been itching for a deep and cohesive economic sim for a long time, and I am really looking forward to this game. Good luck!