Now that we have most European nations, I'd like to see a WWI/II/Cold War scenario.
Agreed. But I think a WWII scenario is out of the question because it would be pointless to have that scenario while excluding the key figure that started it all. For some reason, that particular leader is forbidden in the world of civ, and can't even be mentioned on this forum. If there was a WWII scenario, they would give Germany a ridiculous leader, probably Rommel or something like that. That would be like making Patton the leader of America.
But they could easily do a cold war scenario. They could probably make great use of the world congress in a scenario like this.