We once again turn to arcade distributor US Industrial's website on their website for the scope of this yet-to-be-confirmed rumor. As their New Products page reveals, the company is inviting ordering for a Taiko no Tatsujin July 2014 Conversion Kit item. That could imply we are going to see another large-scale firmware update! This is also mirrored by a corresponding entry at am-net, an arcade game information portal.
This is also the first large-scale firmware update since the advent of International HD Taiko cabinets. What would this mean for all the overseas Donders?
The content description goes on to revealing some possible candidates of new features, including character songs for the popular mascots Funassyi and Kumamon (i.e. Kumamoto Surprise! as from Wii U1 DLC). And of course the usual fare of new additions of J-POP, Anime, Vocaloid and even Touhou Project Arrange tunes will also be present.
