A portion of a Siliconera interview with Ichiro Hazama, producer...

S: Do you view Theatrhythm as a series now? What series would you want to work with… Manarhythm? Theatrhythm… Hitman?

IH: [Laughs.] Personally, I hope this will be come a series, but Theatrhythm Hitman will probably be really far off. There are many series that I would want to work on for Theatrhythm. Dragon Quest has a lot of music and Kingdom Hearts would be wonderful to do if it’s possible. I’m not to familiar with the Eidos collection, but Tomb Raider has a long history so it must have a great collection of songs. That might be fun.