This is definitely something worth to get excited about, even more so if they will finally get an international version of this going. ^__^
Hoping Square reveals an international verison of this during E3. I've been dreaming of a KH Hyrule Historia for a while now. To see it come true only to have it be entirely in Japanese would be heartbreaking. I'd still buy it anyway, but I'd just stare at the pictures and have no idea what it says.
Again, that's only assuming this is a "Hyrule Historia" of KH. It may very well just be a giant summary of all previous Ultimanias meant to help newbies or confused fans catch up on stuff.