Theatrhythm Final Fantasy Curtain Call has more music like Advent: One Winged Angel from Final Fantasy VII: Advent Children and additional characters such as Zach from Final Fantasy VII.
V-Jump confirmed new characters like Y’shtola from Final Fantasy XIV. Yuna, Rikku, and Paine from Final Fantasy X-2 will be in the game as well as second version of Lightning from Lightning Returns: Final Fantasy. Players can unlock these characters by collecting crystal fragments just like in the original Theatrhythm.
Theatrhythm Final Fantasy Curtain Call also has a search function where you can look for songs by their name and create a playlist of favorite tunes. Square Enix plans to release Theatrhythm Final Fantasy Curtain Call for Nintendo 3DS in Japan in spring 2014.