There are two songs you can download for free in case you didn't realize or get the message. They are Roses of May (FMS) and Battle 2 (BMS).

Thank you for the reminder!

Also you should buy the rest because this game is AWESOME!

EDIT: Ohhh shiiiiiii... Aerith's Theme piano version comes out next week I was learning that at one point woo!

@starvinggamer: Care to share this list of upcoming DLC?

@chemystery:

On sale September 25

Songs

• "Protect the Espers!" (FINAL FANTASY VI)
• "Battle 1 - arrangement - from FINAL FANTASY IX" (DISSIDA FINAL FANTASY)
• "Promised Grade" (FINAL FANTASY CRYSTAL CHRONICLES)
• "Aerith's Theme (Piano Version)" (FINAL FANTASY VII: ADVENT CHILDREN)
• "Battle Theme A" (FINAL FANTASY II)
• "Good King Moggle Mog XII" (FINAL FANTASY XIV: A Realm Reborn)
• "Thunder Plains" (FINAL FANTASY X)
• "Canto Mortis -An Undocumented Battle-" (DISSIDIA 012[duodecim] FINAL FANTASY)

Character

• Rosa (FINAL FANTASY IV)

Also taken from here (http://finalfantasy.wikia.com/wiki/Theatrhythm_Final_Fantasy:_Curtain_Call) it looks like there are a total of 50 songs and 7 characters planned as DLC?