I got this from Wikipedia so take this with a grain of salt:
The December 2012 issue of German magazine iOS GameZone contained an interview with Hiroyuki Ito. The interview was mainly about the iOS game Guardian Cross and how it has become popular in Germany. Hiroyuki Ito clarified that he only created the game design, wrote the base story and supervised the game's development; he did not produce or direct the game.
After asking a series of questions about Guardian Cross, the interviewer then asked questions related to the Final Fantasy series. He asked Hiroyuki Ito why he has not worked on any Final Fantasy games since the release of Final Fantasy XII, citing the game as being mature and complex and breathing new life into the Final Fantasy series. Hiroyuki Ito replied that he's been busy leading development of an unannounced, large-scale project since 2008. The interviewer then asked when this project will be announced. Hiroyuki Ito replied that he doesn't know as Square Enix president, Yoichi Wada has delayed the announcement until Final Fantasy XIV: A Realm Reborn is released worldwide and gains a certain amount of subscribers. The interviewer asked if this unannounced game was a Final Fantasy game. Hiroyuki Ito laughed and replied, "You'll find out when the game is announced."
On a separate point, the interviewer asked Hiroyuki Ito if the Active Dimension Battle (ADB) system will ever be used again seeing as Final Fantasy XIII never used it. Hiroyuki Ito replied that ADB is alive and that he's preparing its evolution. The interviewer then asked Hiroyuki Ito if he has played Xenoblade Chronicles due to the battle system being clearly influenced by ADB. Hiroyuki Ito replied that he has played the game and that he was impressed with the scale of the world and found the underlying mechanics of the battle system to be interesting.
The interview concluded by the interviewer asking what's next for the Guardian Cross series. Hiroyuki Ito replied that it has been really successful in some countries and a disappointment in others. He hopes that word of mouth of the game continues to spread and it keeps gaining in popularity. He added that he's considering adding Guardian Cross connectivity to his unannounced, large-scale game. Player's will be able to connect their Guardian Cross accounts to the game and challenge the NPCs in the world and also enter tournaments in the various cities.