The first of several planned DLC packs for Assassin’s Creed: Revelations launched Tuesday, bringing a few fresh faces to the party. The Ancestors Character Pack contains four new multiplayer characters: Privateer, Corsair, Brigand (I think someone has a pirate fixation) and Gladiator. All four characters start with full weapon and appearance customization options unlike the level-unlocked options for the default characters.
Unfortunately, this is a multiplayer-only DLC with no expansion for the single-player portion. In light of this, I would only recommend this DLC if you are really into the multiplayer and crave additional skins. The Ancestor Character Pack is 320 MS points on Xbox or $3.99 for the PS3 and PC.