If you preorder Kingdom Hearts HD 1.5 Remix, you can recieve a limited edition artbook for free.
Kingdom Hearts HD 1.5 Remix is a high definition remastered collection of the Kingdom Hearts series developed by Square Enix exclusively for the PlayStation 3. It contains both Kingdom Hearts Final Mix and Re:Chain of Memories in HD and adds trophy support. Additionally, the collection features Kingdom Hearts 358/2 Days in a Theater Mode, spanning 2 hours and 50 minutes of HD remastered cinematics from the original game, and once more, support trophies.
Kingdom Hearts HD 1.5 Remix is scheduled to be released September 10, 2013 in North America, September 12, 2013 in Australia, and September 13, 2013 in Europe.