I'd just like to say that I reckon World War 1 would be a better period to frame an Assassins Creed game in than World War 2, primarily as WW2 has been overdone a great deal in games but also because society during WW1 was still very rigidly class based and better suited for an Assassins Creed game. The world still wasn't fully automated either, the hideously polluted streets of England would still be ideal for hectic chases and the chance for a snippet of lives at home whilst the war was being fought would be very interesting. In short the start of the 20th century is a period not yet explored to any great depth by games, and I think it could be make for an interesting one.