Ubisoft’s Assassin’s Creed: Brotherhood ships this November and now it will have Collector’s Editions available for the Xbox 360 and Playstation 3. It includes a plague mask “doctor” Jack-in-the-Box collectible, two exclusive single player maps called Aqueduct and Trajan Market, an art book, a “hard copy strategy map” of Rome, the soundtrack and a disc containing trailers and a making-of video plus a preview of the AC: Brotherhood comic.

If you preorder from Gamestop, the Collector’s Edition has an exclusive harlequin Jack-in-the-Box, instead of the masked doctor.
Assassin's Creed; Brotherhood Collector's EditionAssassin's Creed Brotherhood Harlequin Gamestop