Leaked scans from Japanese publication Weekly Jump have spoiled Square Enix’s teaser site surprise.
Turns out, the game is Four Warriors of Light: Final Fantasy Gaiden and is a DS RPG where you are a 14-year old boy who must save the princess who has been kidnapped by a witch.
Parties in your group will be made up of characters you meet along the way. The battle system lacks MP but has been replaced by “charge” next to your standard fight and item commands.
The game hits Japan this fall, and presuming Square isn’t bummed out by the leak and says to hell with it, two more characters should be popping up on the back of the dragon in the next few days.
IGN has the full thing, along with more information on game mechanics.