Oh ya, I forgot about Rising Sun.Pyre00 said:World War One.
And no, it wouldn't be all boring trench warfare. It's pathetic how misunderstood the Great War is. If they did it well, it could very well open the door for more WWI games. As it is, only the bravest of the brave try to make them now. And by the way, the Japanesse campaign has been done before. ALOT. Ever hear of Medal of Honor Rising Sun?
The Future setting has also been beaten half to death, Fallout 3 being the only creative and original future setting (1950s style). I'm sure that the mediocre developers of the world and the mindless herds that follow them will soon beat the life out of the other half, but whatever.
Resistance: FOM and Resistance 2 had sort of futuristic 1950s/60s settings too, with advanced weaponry and stuff. It wasn't as creative as Fallout 3, but I thought it was entertaining.