I don't know why I have high hopes for Gamescom, disappointment for XV fans probably awaits, but I look forward to it nonetheless lol.
Honestly at this point my most hoped addition is a free patch, kinda how the highly requested bros became playable at the end of 2017, maybe at the end of 2018 they'll roll out the highly requested update of playing the game with all the DLC in chronological order. I recently played Beyond Two Souls for the first time, and I liked how at the start it asked if you wanna play the game as originally released or for all the sequences to be chronological. They could do the same with XV and put a little message saying the chronological order playthrough may contain spoilers for first time players in case someone didn't play the game at all. The choice upon starting a new game would be much appreciated by everyone who already experienced all the DLC and simply wanna replay the complete package as one un-interrupted experience.
It might actually be better to do a semi-chronological version rather than a full chronological version in order to avoid spoilers altogether.
Here's how I imagine it:
- The game plays as usual until Gladio returns in Chapter 8
- Game guides player to a campsite, whereupon it offers the player the chance to play Episode Gladio
- The game continues as usual until Noct and his friends are separated in Chapter 13
- The Chapter 13:2 prompt is modified to include three options: Original (Noct only), Short (Gladio only), and Complete (which includes both, and could be executed in a couple of different ways - ideally, Noct's section would be interrupted when he fell off the bridge for Verse 2 and return to where he'd fallen immediately after Verse 2 is complete*, but if that's too difficult, cutting from Noct's story to Gladio's after Noct got stuck in the electrical trap could work).
- Game guides player to a save room, whereupon it offers the player the chance to play Episode Prompto**
- The rest of Chapter 13 continues as usual
- Chapter 14 plays out in its Royal Edition form
- Episode Ignis is unlocked after the game is completed***
* Interrupting Chapter 13 at the fall off the bridge does change the way Ravus' death is revealed from the way it was originally portrayed, but that actually seems like an advantage. Instead of stumbling across Ravus' corpse and a bunch of papers unexpectedly, you see him die and the papers get scattered around him, which would make landing there and being able to read what Ardyn dropped
more meaningful.
** Similar to the above, this would change the way Prompto's origins are revealed from the way it was originally portrayed, but it actually benefits the narrative. While Noct's "So what?" reaction to Prompto being a biological experiment doesn't make for a particularly good reveal, it'd make a fantastic counterpoint to Prompto's self-doubt as shown in Episode Prompto.
*** Episode Ignis could theoretically be played at any time after Noct and Co enter Insomnia, but there's nowhere to put it that wouldn't horribly mess up the pacing. The only other option, if possible, would be to create an edited version that could be played in Chapter 9.