In another thread Wyrm posted a transcript of an interview Miyazaki did, he was referencing it for a piece of lore but I kept reading and I believe the nature of the DLC was inadvertently revealed. He talks about Dusk and a plan they had to create a quest where you head in to Oolacile to help Dusk in her world. Here is the quote (I and M are interviewers, P is Miyazaki)
(I): Dusk of Oolacile's summon sign is hard to find, even though she says to summon her. Does she
actually want to be summoned or she is trolling us? She says she wants to reward you but is she laughing behind our backs?
(P): That is not true.
(MP): lol
(P): No she not. I need to clear up this misunderstanding. She is a very pure character so don't try to make her look bad.
(M): Good person
(IP): Good person
(P): There was a removed event in early development where you get summoned to Oolacile's world, her story was that she came from the old kingdom. So there was a quest to rescue her in the old kingdom after you get summoned. But it disappeared rather quickly. (Sad Gong~)
(IMP): hahahaha
(P): "There is no way we can do that!". The forest, I wanted to make an old forest where its bright, and the ruins restored back to buildings. So it the old Oolacile forest and you get summon by dusk of Oolacile and do some kind of quests was planned but it suddenly disappeared. Shes a character I liked so much that I was thinking about events so stop the slander
I figure they're basing it off this idea they had, or maybe I'm hoping because Dusk is my #2 favorite person in Lordran.
(I): Dusk of Oolacile's summon sign is hard to find, even though she says to summon her. Does she
actually want to be summoned or she is trolling us? She says she wants to reward you but is she laughing behind our backs?
(P): That is not true.
(MP): lol
(P): No she not. I need to clear up this misunderstanding. She is a very pure character so don't try to make her look bad.
(M): Good person
(IP): Good person
(P): There was a removed event in early development where you get summoned to Oolacile's world, her story was that she came from the old kingdom. So there was a quest to rescue her in the old kingdom after you get summoned. But it disappeared rather quickly. (Sad Gong~)
(IMP): hahahaha
(P): "There is no way we can do that!". The forest, I wanted to make an old forest where its bright, and the ruins restored back to buildings. So it the old Oolacile forest and you get summon by dusk of Oolacile and do some kind of quests was planned but it suddenly disappeared. Shes a character I liked so much that I was thinking about events so stop the slander
I figure they're basing it off this idea they had, or maybe I'm hoping because Dusk is my #2 favorite person in Lordran.