Square has something special prepped for the 3DS system. In japan the release of Final Fantasy Explorers falls on the same date as the original release of Final Fantasy 1, which means its the anniversary of FF1. You get a free download code for FF1 with the order of Final Fantasy Explorers. If you rather just play FF1, the game will be downloadable on the eShop and it features 3D support if you wanted to use the 3D mode of the 3DS.

Nothing is announced for western audiences yet but I'm sure we'll hear about it sometime soon.

Source article: Final Fantasy 1 Coming To Nintendo 3DS eShop With 3D Support - Siliconera