Microsoft has updated the Xbox Live Marketplace with a new high definition trailer for Elder Scrolls IV: Oblivion, as well as a theme and two new picture packs for the RPG. The picture packs are titled "Good/Hero Picture Pack" and "Evil/Monster Picture Pack" and each will cost you 100 Microsoft Points. The theme weighs in at 150 Microsoft Points, while the trailer is free at either a 480p or 720p resolution. Time to fire up the Xbox 360!