NEW BATMAN: ARKHAM CITY DLC ?

Trophies for Batman Arkham City DLC have been found on PS3Trophies.org but there's a twist, it's not for any DLC that has been released yet. "Harley Quinn DLC" lists 10 new trophies
but there has been no release date set for the DLC and no information of any kind regarding a possible release date.

As of right now Xbox has no available achievements listed for "Harley Quinn DLC"

I'll drop a post if I find out more.