It will be for iOS.
Square Enix announced working on new releases of Mana and SaGa. Now been made official Emperor Saga × Seiken Densetsu RISE of MANA , which as expected, is for iPhone.
The head of the mobile division had declared that “we will do our best to keep the memories of the days of SNES and PlayStation.” The last games of the sagas are Emperors SaGa 2012 and Rise of Mana, March, both for mobile.
Is no word on a possible release in the West.