Square Enix's original, classic-style Final Fantasy for DS appears to be heading westward. Square Enix trademarked "The 4 Heroes of Light" in the US, which matches pretty closely with the translation of Hikari no 4 Senshi: Final Fantasy Gaiden ("4 Warriors of Light"), the streamlined DS Final Fantasy released in Japan in October. To see the trademark filing, it's number
85006964, searchable in the USPTO database. It might just be the next game you pay the Square Enix tax (by which we mean the customary $40 price for Square's DS games) on!
Square Enix's subsidiary Taito also trademarked "Dariusburst," (serial number
85008406) which, unless some bizarre trick is involved, refers to last year's PSP shooter, which updates the company's classic robo-fish-shooting Darius series.