The picture above comes from one of the latest news feeds from the Arcade Operator Unit's website (available at this link), detailing which music games are joining the competition this year. Aside from the latest versions of Taiko no Tatsujin and the other participating games from last year, the 4th edition of the cross-over tourney will feature the return of Bandai Namco's Synchronica, as well as the debut of Sega's CHUNITHM series. It's highly likely that the newcomer is getting all of the 1st Otogesai's Phase 1 boss tracks crossovers!
Also from the same document, we come to learn the scheduled dates for the event's major phases, with the first song inclusion coming this October (with the tourney's first phases starting on Oct. 13th) up to the Finals which will be held next year on February 10th.
Thanks crystalsuicune for the heads-up from the Taiko no Tatsujin Discord.
UPDATE: Literally some hours after this blog post's publishing, the Tenkaichi Otogesai website has been officially updated with a brand new splash page starring the 4th edition's six contenders! While there's nothing else to the website renewal as of now, it's possible to access all the pages from the 3rd tournament through the top bar.
【告知】第4回天下一音ゲ祭の公式サイトがオープンしました！ https://t.co/KgIbQCA6hK 今年も太鼓の達人 参加だドン！今後の続報にご期待ください！！— 太鼓チーム (@taiko_team) 12 luglio 2017
