The first bonus for North America residents has been announced for Amazon.com.
Omega, which will also be a post-release DLC in Japan, will be your bonus if you pre-order the game on Amazon. The online retailer claims that by pre-ordering Final Fantasy XIII-2, you will get the Omega boss battle, a unique coliseum battle against boss enemy Omega. Omega will join the party after being defeated. Access code will be emailed within two business days after your order is shipped.
The code will be available for both the Playstation 3 and Xbox 360 versions when it is released on January 31, 2012.
You can pre-order it here.
Also, as a note, Square-Enix will release some downloadable add-ons for the game. This includes the Omega boss battle, detailed above, as well as Additional/Original costume(s) for Noel and Serah. These are intended for the Japanese market, and more details on the North American and European versions will hopefully be announced soon.
Full price and release date for these items is still undetermined, but will come at a later date. More content will announced in the future, as this isn’t the full list of DLC yet.