Level 5's Ni no Kuni is also set to use a 4-Gigabit card, and may very well ship before 3rd Story's summer date, but it's unclear if the game will actually hit its scheduled spring release.
No titles using the new 4-Gigabit cards have been announced for North America.
If the Playstation Final Fantasies were to ever come to the DS, they would be very big game cards that would be well over 1 Gigabyte a piece. Most of this is due to full motion video.No they wouldn't. Video compression technology has improved significantly since the PlayStation era.