Ubisoft has confirmed that free a slab of free DLC for Assassin’s Creed Brotherhood called Copernicus Conspiracy will hit exclusively for PS3 on November 19th 2010.
"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", says the blurb.
Yes, November 19th, same day as the game releases.