Title. Each DA has had the main character be someone special: In origins, you're a warden in a country where they've almost all been defeated or ousted temporarily, putting you in a unique position to save the world. In 2, Hawke is the champion of Kirkwall, and comes to command respect amongst many people. 2 is unique because you earn your special status as a immensely respected champion through nothing more than deeds throughout the story. In inquisition you're the herald/inquisitor and holder of the mark, and also earn your stripes as the leader of the newly most powerful militant group in southern Thedas, the Inquisition, and personally earn your stripes with the leadership decisions, tough choices, and accomplishments you make while leading it.
I honestly feel like dragon age IV will star a Dreamer, and if not, will particularly expand on the lore of dreamers. Being able to enter and shape the fade at will seems to be a definite direction to go to counter the events in Trespasser.
Ooh, a "telltales walking dead season 1" approach where you guide and raise a naive dreamer as a deuteragonist would be incredibly neat and storytelling gold.
Dreamers, after all, are what Tevinter center around - their whole "breeding" philosiphy, amongst other things, centers around the bloodlines from the original dreamers. A scene in Trespasser clearly shows evidence that strongly hints towards the sequel taking place entirely or in part in Tevinter, where the game has not gone yet.