User blog comment:Argorrath/Treyarch releases a BO2 teaser video called "Origins" for DLC 4/@comment-1055346-20130808004648/@comment-173.55.118.141-20130808010359

I'm pretty sure it's called The Giant for a reason. Why isn't Der Riese all nice and tidy? Why is there fire, missing walls, and destruction everywhere? Maxis built the robot at Der Riese. The robot probably had its own mind and escaped Der Riese, leaving destroying the place.

''"...This is where it all began. Is this where it all ends?" - Der Riese''

(I got this info from PTG)