Square Enix plans to offer new DLC for Theatrhythm Final Fantasy songs through coming in the next few days.

Per customary, four songs will only be released.

Final Fantasy X’s Otherworld (battle music).
Final Fantasy XI’s The Sanctuary of Zi’Tah (field music).
Final Fantasy IX’s Battle 2 (battle music).
Final Fantasy III’s Final Struggle to the Death (battle music).

Each music piece launches on May 30 for 150 yen each. You can find samples for all of the songs above in the video.