Who would have ever thought a Disney and Final Fantasy mashup would be a smash hit? To date the Kingdom Hearts series sold ten million copies worldwide. That number includes the PS2 games and all reprints, Chain of Memories for the GBA and Kingdom Hearts II which came out last year. Next year Square-Enix is going to release Kingdom Hearts II: Final Mix+ in Japan, which is an extended version of KH II with the English voice actors for 7,890 yen ($66). The Kingdom Hearts series eventually has to have a limit. How many more Disney worlds can Sora explore before the team ups seem ridiculous?