Toei recently updated their official animation twitter page with an announcement that the final chapter of Digimon Adventure tri. will feature a new rendition of “Butter-fly.” The new version of the song will feature the voices of the “DigiDestined”, Ayumi Miyazauki, AiM, and the late Kouji Wada. Digimon Adventure tri.: Our Future will premiere in Japanese theaters on May 5 and in US theaters presented by Fathom Events on September 20.
A new rendition of "Butter-Fly" will be the ending theme song for the final Digimon Adventure tri. film, "Bokura no Mirai (Our Future)".
"Butter-Fly ~tri.Version~" will feature the "DigiDestined" cast members, the "Digimon Singers," Ayumi Miyazaki, AiM, and the late Kouji Wada. pic.twitter.com/hNDV7TrMws
— Toei Animation (@ToeiAnimation) March 1, 2018
Source: Toei Animation