Ubisoft have announced that PS3 owners will get exclusive and free DLC for Assassin's Creed: Brotherhood on the day on release. The DLC is entitled Copernicus Conspiracy and below is a brief description of what you can expect:
"In this additional content, players will have access to several new missions. An exclusive mission giver, the famous Renaissance astronomer Copernicus, will provide the extra content for players, including courier, assassination and protection missions. Ezio will be tasked with foiling the conspiracy against Copernicus and defending his philosophy."