The fan-run website Arkhamverse discovered the achievements for the Batman: Arkham Origins DLC, titled "Cold, Cold Heart", hidden away on Steam, and while it doesn't reveal much of the plot, it does confirm several aspects. We will play a portion of the game as Bruce Wayne, as well as use new gadgets -- the cryonucleation tunneller and, apparently, some frozen batarangs. Anarky (or perhaps just his followers) will also make a return in the form of Anarky tags.