Call of Duty: Black Ops DLC (somehow) escalates

It seems almost impossible that there would be anything left to wring out of Call of Duty: Black Ops, but leaked details of an ‘Escalation’ pack seem to prove that, in fact, there is.
VG247 picked up on a flyer (shown below, click for the full image) posted by the Australian branch of game, showing details and a release date for Escalation.
It looks to be a timed Xbox 360 exclusive (presumably with PS3 and PC releases to come) and will feature maps at a zoo, a hotel, a convoy and a stockpile. In addition, there’ll be one of those zombie things called ‘Call of the Dead.’
The date shown on the advert is 3 May, but that’s presumably the Australian release date so the US/EU one may well be a few days earlier.
Activision has issued a tight-lipped “no comment,” but this all looks about as legit as it gets.