http://www.gametrailers.com/player/35413.html The idea of them not staying with the modern theme hasn't been a popular one. Also its being made by the people who made COD3, different from the group who made COD4. I don't think COD3 was that bad mainly because they tried some different things with the online multiplayer with medics and you were able to play split screen with up to 3 other friends. Anyway From the footage I think it looks like it could be pretty good. They will use the same physics engine that was used in cod4 and they will stick with the knife feature as well. And the biggie, it will have 4 player co-op story mode.
I don't got much hope for this game... As a side note its rumored Infinity Ward is working on a scifi game..
It looks pretty nice... But if its anything like COD3... i probably wont be to interested. COD3's single player did nothing for me, it was boring in comparison to COD2 i thought, and then of course COD4 just blew them all away. Anyways, i guess ill take the wait and see approach to this one.
Call of Duty has never appealed to me. I'm looking forward to Brothers in Arms: Hell's Highway. The BiA series has always been better than Call of Duty.