Because we can’t have nice things in the year of our lord 2016, Utada Hikaru‘s father (Utada Teruzane) recently clarified that Hikki’s supposed participation in the ‘Kingdom Hearts III‘ theme song is not yet official.
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
Of course, that contradicts what he said about them having already started working on it, but I mean he kinda did the same thing three years ago, so I guess it shouldn’t be that surprising.
I apologize for what I said. I was little confused when asked whether we would be involved in Kingdom Hearts III. As of now it's undecided.
— u3music (@u3music) October 18, 2013
Regardless, I have to think Hikki will be involved somehow since she wants it, because at this point how could they refuse her?