We've seen Noct with the ring before the timeskip, so if he's missing it in Chapter 0, he'd have had to have lost it at some point either way. For all we know, the reason he doesn't have the ring in Chapter 0 might be because of whatever he did when the ring exploded everything.
However, I'm betting on those scenes happening after you clear out the entrance to the palace in Chapter 0.
The only thing I can find in relation to voice sounds is a comment from Tabata that the English recording for ED was done and he felt it didn't suit the character, but it was too late to re-record.
We can't even be sure Chapter 0 isn't like the "Omen" trailer, a kind of weird premonition of what might happen.
We can't even be sure Chapter 0 isn't like the "Omen" trailer, a kind of weird premonition of what might happen.
As for Chapter 0 being a premonition, I could see it, although I don't think it is. I think that that might where you finally recover the throne and then you have to fight whoever the final boss is in the palace or wherever (the crystal? Ardyn? Ravus? A previous King?).
Man, I wonder what Ardyn is up to. Also, considering he's the Chanchellor of Niflheim and that Luna has basically been a prisoner as a princess of a conquered country, I wonder if they know each other well and, if so, what kind of relationship they've developed. Especially considering Ardyn seems to live by under a facade most of the time.