I'm guessing there will be a Miku cover of Butter-Fly, some exclusive merch like buttons or acrylic stands or keychains, maybe the other Crypton Vocaloids will make an appearance (Rin, Len, Luka, Meiko, and Kaito), and maybe some original songs. Might even have a song show up in the upcoming movie. I don't expect anything huge.Although if you ask me, if any Vocaloid should be in an official Digimon crossover, it should be Gumi. She's got the goggles and everythingOr Mirai Komachi, who's also made by Bandai Namco.