5 new achievements have been listed for DA2, for the upcoming dlc.
A New Day - Meet Tallis in Hightown
Chasing the Game - Lure and kill an Alpha Wyvern near the Chateau Haine
Blackjack Subtle - Evade vault security in the Chateau Haine
The Take - Disarm the firetraps in the Chateau Haine's vaults
The above is unconfirmed and courtesy of Trueachievements.com.