From the stage event, it has just been confirmed that Tales of Graces' theme song will be ???????White Wishes?? (I Want to Protect ~White Wishes~, mamoritai ~White Wishes~) to be sung by Korean singer BoA, a popular singer active in both Korea and Japan. You may know of her songs from a few anime shows (InuYasha and Monkey Typhoon). To those who have doubts, even Famitsu already has an article on this. BoA herself was even at the stage show.
And the game is actually 80% complete already, according to the announcements at the stage event. Nore mentioned that Baba said that aDecember release for the game is possible. The stage event has already ended, so news might become scarce now.