This thread will be certainly one to watch. Your concept art is once again fantastic!
There is one thing that you should think about. At the moment it is impossible to make a campaign without the Senate. The game will crash when pressing the faction detail button. Here is a wild idea to use the Senate:
The Monks (I'm sure you can figure out a better name)
There are 2 warring factions, but the Monks are somewhat inbetween in the beginning. But they want the Japanese and Chinese to forget their issues and start fighting back the Demons to whatever Hellhole they came from. Rome could be transformed to be their religious capital.
Alternatively you could go for something like this:
The Senate from Hell (I have no creativity whatsoever)
The Demons came into the world via a gigantic gate to another dimension. This gate is Rome. The other factions must capture that gate (it's the hardcoded goal of the game). The Senate from Hell commands 1-3 demon factions to destroy mankind. But there is nothing to stop these demon factions to grab power for themselves and overthrow the Senate from Hell.
...hmmm yeah...
Great art, Hoggy!
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