Since Arceus, we have content that never saw the light of the day. But only Arceus had an event planned, just never released (the Azure flute)

We have AZ Floette laying around since XY, but still no detalils on how to get her. Pokédex entries said that she has a tremendous amount of power on that flower, and she even got a new move that happens to be the strongest fairy type move.

However, do you see her being released someday? And if so, how do you think it will be implemented?