Domain of Anguish

The Domain of Anguish is a new "elite" location officially announced by ArenaNet to be added to the Nightfall campaign in a major update on the 1st of December:


 * "Players who have completed Nightfall will be given access to this elite area through the Chantry of Secrets on Friday, December 1st. You will find four separate areas for players to explore, nearly a dozen quests, new armor upgrade options, a system for acquiring novel weapons, and of course a compelling mission as well."

It is expected that the Domain of Anguish is located within The Mists, probably in the Realm of Torment, and that access will be granted through the Statue of the Goddess of Truth in the Chantry of Secrets. The statue is hidden in an area within the outpost that can only be accessed by people who have completed all storyline missions.