It was part of pre order, however if you buy the hardend edition it will include the nuketown download password inside the game case. The only problem is you missed the first double xp weekend if you didn't preorder it. Anyway it will be included in the next DLC maps, about 6 months from now.
DONT BUY IT! Lol I modded my Xbox360 Slim with the x360key and downloaded it about 2 weeks ago, and i've been playing it since! Lol and you can simply download the map packs and install them :).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.