A
live conference at NicoRadio on Monday revealed this little bit about Taiko no Tatsujin's appearance at the NicoNico Super Conference 2, which will be held on April 27th and 28th, and will feature, among performances by musicians and music-playing tips, a free-to-play cabinet of Taiko 0 Sorairo, with songs that are not on the current networked build.
Wonder what they are? Guess we'll find out next month!
Link to NicoNico Conference page