In addition to working on the Senran Kagura series producer Kenichiro Takaki was also working on IA/VT Colorful, a vocaloid music game for PlayStation Vita. The title was originally supposed to ship on July 31 in Japan, but was delayed to fall 2014.
Marvelous announced the game was pushed back again to 2015, but didn’t give a specific reason why. Meanwhile, Senran Kagura: Estival Versus for PlayStation 4 and Vita has a firm March 26, 2015 release date.
Marvelous also has other projects in the work like Luminous Arc Infinity, PoPoLoCrois Farm Story, and an updated version of Bakumatsu Rock in the works. There’s also Kaio: King of Pirates which we haven’t heard much about after its initial announcement.