Moon Monkey
Smash Hero
They already have a couple remakes/remastered games on the iOS. Like TWEWY and FF ll, lll, IV,V Tactics. the prices aren't even good for iOS games, you might as well get the for a Vita or console online storeFocusing more on smart phone/tablet gaming is smart (if they can get FFI-VI, DQI-VI, Chrono Trigger, etc) plus a few other games on there as well, they could make a lot of money.
But yeah, Square Enix alone couldn't make a successful console (Square Enix is long past its' prime, and their circle in Western gaming has diminished over the years), unless they say merged with Capcom, EA, Activision, and/or SEGA (absorbing Atlas wouldn't hurt either) and made a console.
I don't think iOS/tablets will be viable for another 5 to 6 years. By then we will have phones just as powerful as the next gen systems.