There has been some talk amongst Kingdom Hearts 2 fans that Square would eventually bring Final Mix+ to the English-speaking shores. They have announced that, partially. The 3D remake of Chain of Memories for the Game Boy Advance is slated to be coming to America this December, as a standalone game. This means no KH2FM+, but at the very least, we get one of the bigger bonuses of that game package. Something that all series fans should consider picking up and trying, even if they've already beaten the GBA installment. =P
Source: http://www.gamespot.com/news/6197934.html
Source: http://www.gamespot.com/news/6197934.html