This is what I'm hoping for. I'd love some alternate takes but hopefully there is a canon aspect to this whole thing. Discounting Aranea because I think it will be part of the main game.
For example: doing everything canonically for Ardyn and Luna gives you the Canon Noct ending (maybe an extension to the main ending or whatever). But doing the V2 endings for both give you a grand finale v2 ending for Nocts episode.
Hmm... creating a set of three parallel stories does seem like the best possible outcome, but finding the balance would be so hard. XD;
Here's a thought -- what if the DLC trilogy assumes that the canonical ending already
does reflect one means by which Noct and Luna can escape their fate? Instead of a dichotomy between obedient death and defiant survival, the DLC trilogy could create a
trichotomy between fated annihilation, willing ascension to divinity, and outright rejection of the divine (ideally represented by passively fading, pleading for the Crystal's grace, and destroying the Crystal, respectively).
That would certainly resolve the "now the canon ending is suboptimal =(" problem -- it'd be up to the player whether it's better for Noct and Luna to provide eternal divine guidance or for them to seize an impossible happy ending at the expense of a world shorn of the supernatural, and it'd make it very clear that the canon end was a valid choice.
I definitely understand the sentiment for this and I definitely wanted this too, but let's think for a second, what is really missing from the game?
I think Tabata has been trying say this for a while now: but the World of Eos lore-wise is extremely lacking.
The Wicked, The Oracle and The Chosen all have one big thing in common; they are fated to die by the will of the Crystal yet we have actually no idea why. Why did the Starscourge plague the world? Where did it come from (by that, I mean whom)? We have no idea if Ardyn was telling the truth about the crystal or not.
I definitely would love a prologue, don't get me wrong, but I don't see how that could be more important than Eos lore. I'm going to go out on a limb here and say that defying the will of the Crystal and the Cosmogony may actually be the goal of these 3 DLC, and by extension, the real plot of FFXV, we just don't know it yet. It was certainly Ardyn's goal, but perhaps it should have been Luna (her DLC is hinting towards this) and Nocts goal as well.
I personally think Noctis will gain the knowledge from Ardyn and Luna's DLC events (he will somehow witness their events through his eyes) before being able to fight against his fate, as well as their own. I don't think anything before the final chapter will be altered though. Saving all 3 characters from death (even through revival) will probably happen as a major climax type event or through time travel (since it exists already through Umbra).
This is why I also think that "Alternative" doesn't mean "non-canon" but could actually mean more "Complete", which lines with Tabata's words about "Completing the FFXV Universe"
If they actually do that, they might top Legend of Korra for last-second thematic suicide, and that's saying something. >_<
Thankfully, Tabata has said flat-out on numerous occasions that the canon ending is and will remain ending. If they want to make the fighting-fate thing into a "Final Fantasy Versus XV" thing, then that's their prerogative, but throwing away the best ending in the entire franchise in favor of a JRPG cliche is the absolute last thing anyone should want.