Persona 4: Dancing All Night won’t make it out this fall as originally planned. During a NicoNico livestream, Atlus announced the PlayStation Vita music game has been pushed back to sometime in 2015.
Chie, Yosuke, and Kanji from Persona 4 are confirmed to be in the game too along with Rise, Teddie, and the Persona 4 protagonist.
Persona 4: Dancing All Night is being developed by Dingo who also developed the Hatsune Miku: Project Diva series and more recently the Love Live! School Idol Paradise games. Atlus USA confirmed the game for the West, but have not set a release window.