I mean, a game is a virtual world; so you're trying to create an 'ambiance'. I understand the time issue, but why not use good old hoi idea, and include some nice photos, pic or whatever remembering the victorian aera, just like you did with your very nice trailer. For an instance, one could imaging the same population control pannel having as header background a graphic showing a crowd of varying size: you click a small pop state, and get a small crowd as background, you click on New York and the same background could fill up with lots of different people. Old ones, younglings, women, kids ... and why not a vickyish styled pic of you paradox developpers within it ? I can only imagine how much whipsers this would gather all over the net, one thinking he saw yourself, King, somewhere hidden in the game, another stating that there is definitely a photo of Johan ....