We'll do it. Actually we have already started. Sorry for keeping you waiting. teruzane @ritch_diaz @utadahikaru Still Waiting for a confirma— u3music (@u3music) December 22, 2016
However, there was an updated on Twitter, that it won't confirmed and they're is speculation on whether Hikaru will still do the song.
one correction. regarding hikaru's involvement in Kingdom Hearts III, we are eager to do it. however, our decision is not official yet. teru— u3music (@u3music) December 23, 2016