Sadly, WWII is not popular right now so the release of such games has not happened for a while.
The best WWII FPS game I have played is MoH Heroes 2, the selection of guns was lacking and the community was a bit small. I however like the games with smaller communities, not entirely sure why though.
The only COD game that I have played in depth was Black Ops. I was impressed in certain areas and left disappointed in others. One of my biggest problems with COD was the complete disrespect that naturally came with the game. I quickly learned to make a point of muting any squeaker that continued to run his mouth. That however is something that is beyond the admins control for the most part. My other big issue was how ridiculously over powered some of the guns were in the game. In the MoH game play, they did a very good job of making sure both teams weapons were respectably balanced.
I don't understand the die hard fanaticism with COD. Just because a company comes out with a new game every year, does not mean you have to go out and buy it. I personally tend to lean towards MoH games because the are more thought out and planned.
I will most likely be getting MoH War Fighter because it does look like a good game. I also wanted Battlefield 3 but never actually got it. I may have to buy that as well.
That being said if a COD game came out that was WWII based, I would buy it in a heart beat.