Theatrhythm Final Fantasy: Curtain Call was a joy to play. It was absolutely packed with content, so the fact that DLC has been steadily dropping since launch hasn't bothered me -- all in all, it's one of the biggest rhythm games ever made.
Should you want DLC, Square Enix will oblige, especially this week in Japan. The kicker is that two songs of Chrono Trigger and The World Ends With You are arriving in-game, as well as a track each from FFVIII and Romancing SaGa 3.
See below for the full track list, and it's pretty clear that it will come west at some point.