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Update: There will be TWO versions (of sorts) for the All-in-One package deal. The first is a digital download version which can be currently preordered from PSN. This costs $99.99 and includes Kingdom Hearts 1.5+2.5, Kingdom Hearts 2.8, and Kingdom Hearts 3 (when it becomes available). This version will include a theme and a Star Seeker variant keyblade (for Kingdom Hearts III). A picture of the theme has been linked below thanks to Pixxz on Twitter

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The second version is a physical version, which seems to be Japan only for right now. This version includes physical copies of all the Kingdom Hearts games, the artbook from the special editions, the theme (shown above), and an original box. This version will cost 19,800 yen (tax included) and can be found on the Japanese Square Enix Store

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Original: The Sony E3 Showcase had a ton of surprises for Kingdom Hearts! And it looks like all the Kingdom Hearts game within one package is one of them. From the looks of it though, it looks like it's only coming to PS4 (sorry Xbox fans
:( )

Unfortunately, we know absolutely nothing else about it yet. We'll be sure to let you know when we know!