According to Famitsu.com, a three-episode OVA of The iDOLM@STER was announced at the live event THE IDOLM@STER 7th Anniversary. The OVA will be bundled with the new iM@S game “iDOLM@STER Shiny Festa”, which will be released in three different versions: “Honey Sound”, “Funky Note”, and “Groovy Tune”. Each version will carry only one episode of the OVA. The production staff are the same as those of the TV series.
Source: Famitsu
The iDOLM@STER: Shiny Festa on MAL