So, Square Enix announced that they were making a collection of HD remakes, including Kingdom Hearts Final Mix and Kingdom Hearts Re:Chain of Memories at this year’s Tokyo Game Show. Soon after the announcement, Square released a trailer for said HD collection. Both games in this collection will include trophy support. Also, as you’ll see in the trailer, the re-release of Kingdom Hearts Final Mix will use Japanese voices, as opposed to the English voice cast used in the original release of Final Mix.
This HD collection is scheduled for a Japanese release sometime in 2013. Any plans for an international release is unknown at this time.
Source (http://www NULL.siliconera NULL.com/2012/09/23/kingdom-hearts-hd-1-5-remix-first-look-with-the-tgs-trailer/)