Along with that trinket, the set includes a statuette of Sonic and his pal Sonic, an artbook with unseen illustrations from the series, a 20th anniversary soundtrack, and a documentary called "History of Sonic: Birth of an Icon." Oh, and there's a PS3 or Xbox 360 copy of the actual game, and a DLC voucher.
This is even more stuff than was included in retail listings for the Collector's Edition. But a few important things won't be part of the deal: there won't be a Collector's Edition for the 3DS version, and there won't be an American release either. This is for Europe only.