It would appear that GameStop's Italian portal has jumped the gun and revealed the contents of Final Fantasy XIII's hitherto-mysterious collector's edition.
Available now for pre-order at the price of € 80 ($110), the retailer says the pack includes a soundtrack, art book, prequel story, comic book and collection of art cards.
While the game is advertised on a European retail site, you'd expect the US edition to be similar, if not identical. If you're looking for pictures, sorry, there are no pics available.
Final Fantasy XIII - Collector's Edition [GameStop, thanks Phil!]