It wouldn't be a proper EA game release without both pre-order exclusive DLC and a "Project Ten Dollar" bonus for new copies, and Dragon Age 2 is holding to those sacred tenets.
Pre-ordering the game from "participating retailers" -- or already having done so -- will earn you the Fadeshear long sword, which deals extra damage against demons and undead enemies, and the Lion of Orlais shield, which boosts health and experience and has two rune slots.
Just buying the game new will get you an even better bonus: the "Black Emporium" location (huh, maybe that one should have been reserved for GameStop!) where you can find an appearance-changing mirror and a whistle that summons a mabari warhound. To sum up: puppy!