Origins could make nice move trilogy, ofc with the Warden as the main char. The first film would begin with one of the origins (probably human noble) and conclude with the battle at Ostagar. The second film would be about recuriting allies, and in the third we could see the landsmeet and defeat of the Archdemon.
Of course, the movie adaption can't be as detailed as the game, so some of the plotlines and characters would need to be cut. I was thinking the main characters should include the Warden, Alistair, Morrigan, Leliana and maybe Sten and dog from the party; and Arl Eamon, Loghain and Howe from the other NPCs. For the plotlines, I'm not sure how they should be adapted into the movie.