I was reading the Xbox 360 magazine and there star article was about Call of Duty 5:World at war. Since the game has a developing time of 2 years not much was really indepth, but this is what I know.

1. The campaing will switch off from a American marine in the Pacific, to a Russian soldier on their way to conquer Berlin. Let me just say that this is the second time where the campaign is focused on Japan, the only other one that I am aware of is Medeal of Honor: Rising sun
2. This Call of Duty will be copying Halo becuase you and three friends can play together in the campaign.
3. You can use a flame thrower. Do I have to say more?
4. Online matches will probally be raised from 16 to 18. Also War mode from call of duty 3 will be brought back.
5. The online gameplay in Call of duty 4 will be copyd for this one.
6. One level will be flying a plane and destrying Japanse ships.
7. The devs will try to copy the brutality and anger that both sides witnessed and had in the war.
8. There will be plentey of sneak attacks.
9. The game mechincs will be pretty realistic. Grenades will sink to the bottom before exploding and bullets will not do as much damage when hitting the water.

I hope you found this intresting!