Steelbox edition has been announced for Europe, other regions have not been announced yet.
http://www.serebii.net/steelbook.jpg (Unsupported image host)

Preordering the Steelbox Edition will give you a Figure of Primal Kyogre or Primal Groudon for their respective games. Preordering ORAS in New Zealand or Austrailia will also get you a figure.

http://www.serebii.net/orasfigures.jpg (Unsupported image host)

Preordering the Stand Alone Version from Shopto gets a atorchic Keychain.
http://www.serebii.net/torchickeyring.jpg (Unsupported image host)