A while ago a survey asked about which kind of content we as fans would like to see in the future - so, who won the race?
A: It was Ardyn´s backstory that the majority voted for - so we clearly got the message he´s the person fans want to know more about. We´re not sure as of yet how we´ll do it though - it´s a lot of story, and telling a character´s story is always the most difficult and detailed part of a game. So, we don´t know yet whether we´ll make it another game, no dlc though, it would be a full game, or a movie, comic etc. We really want to tell his story though. Second in the survey was Luna´s story by the way.
this is weird tho, since the survey was asking for additional content it's implicit that is additional to the game; i def don't want to see his story throught a comic, i'd say just make a meaty dlc as a gran finale to FFXV updates.
i checked the link and there's another interesting tidbit, and no plans to delve into the hexatheon's lore:
Another thing; what about Iris? We heard Prompto say at one point she´s gotten really tough, they call her the demonslayer Iris now - will we get to see someting of that?
A: Well, actually we were planning on showing some of this in the comrades-dlc, since, you know, it takes place at this very time. However, we´re not sure about just how much we can manage to cram in there - it´s all very difficult still.
Will we someday get more lore, especially about the astrals and their relations to the royal family, and about the background of pitioss dungeon?
A: Ah well, you know, we created pitioss as a mystery, a puzzle to be solved by the player. So let´s just not talk about that and instead move on, shall we? (laughs) When it comes to the hexatheon, there sure was a lot going on between them, but for now there are no plans on diving further into their backstory. They are a part of the magic of this world, and as such, tightly intertwined with it, but that´s all for now. I´ll keep it in mind though.