yes I also don't know why MS keeps releasing the Fable 3 DLC that early but according to the Day-1-DLC description
Microsoft has also announced that every new copy of Fable III will be packaged with a one-time-use Xbox Live download code that will grant access to the following exclusive content:
* Raise Dead Potion - Call forth undead minions to your aid
* Slow Time Potion - Extend battle time for more attacks
* Scot Male Hero Outfit or the Scot Female Hero Outfit - For the fashionably conscious, try them on and keep them
* Highlander Tattoo Set - perfect for a hero or heroine looking to get inked
* Red Setter Dog Skin - Transform your faithful furry companion into a whole new breed
So we don't have to purchase this content. We get it for free