After only just recently confirming his daughter’s involvement with Kingdom Hearts III, Teruzane Utada has clarified his previous statement made on twitter with an apology:
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
So now we have no idea if she really is involved or not with Kingdom Hearts III’s theme song, only time will tell now.