Square Enix Japan's e-Store has revealed that a Kingdom Hearts 15th Anniversary Box will be available as a pre-order bonus for HD 1.5+2.5 ReMix in Japan, intended to store a copy of both 1.5+2.5, as well as the recently released 'Kingdom Hearts 2.8 HD Final Chapter Prologue'. The box also contains artwork that merges the three cover arts of the three HD re-releases (something that Nomura talked about in the past). Take a look at how the anniversary box looks like below:

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