The new Final Fantasy game is indeed Final Fantasy All the Bravest, for iOS devices. It hit the New Zealand iTunes store a couple hours ago.
All the Bravest uses the Active Time Battle system popularised by older Final Fantasy games. "Every character possesses an ATB gauge that displays the time remaining until that character can execute an action," the description says. "When the gauge is full, simply tap or drag your finger over the character to attack. Touch multiple characters in quick succession to experience exhilarating and fast-paced battle."
All the Bravest will feature characters, enemies and music (more than 30 songs) spanning the Final Fantasy series, and offers red mage, monk and warrior among the 20 classic jobs that are unlockable as players progress through the game. Old foes like behemoths and cactuars will be followed by a boss showdown at the end of each stage.
Also, an in-game shop will offer 35 premium characters from "a number of Final Fantasy titles." The characters appear to be randomly awarded when purchased. Additional game stages from Final Fantasy VII, X and XIII also are available.