i doubt they're gonna have zombies. W@W is made by Activision, not Infinity ward, so although the games are similar, its easy to see the differences between the two. MW2 will have 'special forces' which is basically an expansion on the last level in cod4, and it'll be co-op 2 player.
eeeeeh, Activision did not make World at War, they're the publisher.
Treyarch did World at War which is why it's so bad.
ps. they need to bring Shipment back. Hardcore Headquarters on Shipment is the shit!