Modern Warefare 2- Alien Terrorists???

Has anyone heard anything about this? Right now its just a rumor floating around but there are comments from people all over the web saying stuff like...

"Yeah, Its defiantly in there. I've seen it be played."

as well as

"It is confirmed that there is no survival mode or any mode equivalent to Nazi Zombies in the next game."

What have you heard, and What do you think about the mode in general?

I have heard it, but its not true, there will probably be some kind of survival mode. But not aliens. That would be just GAY.

yea if they do aliens i can suspect the reveiws wont be that good if thats all they focus on lol