Update (and edited): The limited edition that includes the PS4 Pro will include Kingdom Hearts III, and DLC for a special keyblade, and a special theme (likely the same included with the digital download preorder of Kingdom Hearts III). This version can be found on the Japanese Playstation page (but doesn't include preorder information). The price for this is ¥ 53,780 + tax. This is ONLY for Japan, currently.
We weren't kidding when we said Sony dropped a lot of Kingdom Hearts news! After all these Kingdom Hearts games... we're finally getting a Kingdom Hearts 3 PS4 (Pro) in the West (we're assuming since they announced at at E3).
Unfortunately, nothing else is known about it, so we'll have to let you know when we know more!
Here's what the special theme mentioned above will look like:
UPDATED Kingdom Hearts III Limited Edition PlayStation 4 Pro to be Released