So... it is WW2 as rumoured then? I'm not much into FPS games (especially MP focused ones) but if it's WW2 I'm definitely out. I just find that era incredibly boring. A modern day one could have interested me though.
People are tired of modern/futuristic FPS that was pushed by CoD in the last years to the point of saturation. WW1-2 is giving fans a fresh air until it becomes saturated, they get bored again and demand modern shooter. Then the cycle repeats.
WW shooter -> Saturation -> Modern/Futuristic shooter -> Saturation -> repeat.