So if you don't remember, I was the one that found all the info about Escalation before it came out and it was basically all correct. So I thought I would do it again and see if it's all right this time. ;)

First of all, the new weapon. From what I've found so far, it's called "31-79 JGb215". Kind of a weird name right? And the Upgraded version is called "The Fractalizer". That's a little more like it.

So what does it do?
It apparently shinks the zombies. And I don't know what it does upgraded yet.

That's all I have on weapons so far but here's the descriptions for the maps.

Hangar 18
Soviet forces have infiltrated a highly classified U.S. facility.

Hazard
Keep an eye out for snipers as you battle up and down the fairway of this cliffside golf course.

Firebase
Rumble in a Firebase.

Drive-In
Close-quarter fights and powerful overwatches at an abandoned outdoor cinema.

And the Zombie map:
Shangri-La
A legendary shrine lost in an exotic jungle, where the undead lurk within a treacherous labyrinth of underground caverns, deadly traps and dark secrets.