Oops, look like someone got Raiden in my Assassin's Creed: Brotherhood.
An eye for an eye, and with former Assassin's Creed hero Altair appearing in Konami's Metal Gear Solid 4, it's only right to get even by throwing Metal Gear's own assassin into the world of Brotherhood. Raiden looks to be nothing more than an unlockable skin for Ezio, so don't hold your breath for unique skills and animations. Regardless, it'll be awesome tearing Rome's Borgia a new one with Raiden while patiently waiting for news on his upcoming title, Metal Gear Solid: Rising.