The legendary witch is one of the greatest shapeshifters in the Dragon Age universe. Daughter of Flemeth, the witch that helps the Grey Wardens before the blight in Origins, Morrigan is a valuable asset to the Warden, not to mention a romantic possibility that would have huge implications throughout the whole series.
Raised in the woods and fighting off attackers her whole young life, Morrigan's journey up until she meets with the Warden would be a great idea for a standalone game.
Better yet, (SPOILER), make a story about where she went and what she did after romancing the Grey Warden and leaving with his unborn child.
