It does indeed look nice but it's fanmade.


Also, the music used in the fanmade trailer comes from the 'World of Wonder' trailer of Final Fantasy XV which you can see here https://www.youtube.com/watch?v=CzIsbgDt5oM.
Even if they would use this music (which I highly doubt), they would mix it up a bit. But, personally I think they will make a different prelude version again for the intro music.