Dragon Age - Witch Hunt Preview @ GameSpot

A preview of Witch Hunt is up at GameSpot - this one's full of spoilers, so be careful:

In any case, Witch Hunt will let you revisit several locales from the original game, such as Flemeth's old home in the swamp and the Circle of Mages (from the original game's mage origin story), while meeting up to three new companions who can join your party. We began the adventure outside of Flemeth's home, searching for clues as to Morrigan's whereabouts and were greeted by the first companion, a Mabari hound (who, if you've imported a character who played through the original game, will be your original dog character, or will be an all-new companion if you're using a new character to play the DLC). After being joined by the faithful hound, we entered the hovel to find the female elf warrior Ariane who also hunted Morrigan, since the sorceress had apparently stolen away an ancient elven tome from her tribe. After striking a quick truce with the elf (who became our second companion), we then made our way to the mage's circle--both to research "eluvian," the topic of the mysterious elven book and also to meet the DLC's third companion, the mageling Finn.