there should be some help on finding out what will be in mw3, youtube has done a good job of explaining it but we cant know for sure. check out machinamias profiles to see some leaked information on waht is going on.
LINK: LINK:https://www.youtube.com/watch?v=zQ7f-ZNg4TY
LINK: LINK:https://www.youtube.com/watch?v=zQ7f-ZNg4TY