DA4 Prophecies?

What an amazing tread, thank you for sharing it with us! Indeed I think this will give us the main outlook of what to expect- remember how they told us numerous times that main story is already developed for two next games? So in grand scheme we can successfully guess what to expect, considering how much Bioware likes to give hints in codex, if you pay attention (as example- before Trespasser many attentive players already guessed what happened to elvhen gods, taint, what was Solas plan and motivation. Same with titans- people teorised about titans before DLC and were right). So I personally agree 100% that those prophesies are very valuable and need closer examination.
Flemeth's words about Inquisitor make me really enthusiastic and hopeful that he/she will have an impact in next game (fingers crossed for dual protagonist).

All this has happened before, and will happen again.

This makes me think we won't be able to prevent the Veil being destroyed, but the consequences may not be as dire as foreseen by Solas.

Maybe not literally bringing back Andraste or the Maker.

The Inquisitor's role of "harbinger of a new age" could be their attempt at searching for power equal to Fen'Harel, the prerequisite to bringing back the Maker according to the Chantry is for the Chant of Light to be sung "from all/four corners of the world".

Morrigan being it's "inheritor" could mean that she is a descendant of Andraste or gains her power, by the time of DAI the Urn of Andraste(or what's left of it depending on DAO choices) is gone.

Sorry, didn't read it all, but this part I found interesting. Solas locked the "Old Gods" away for a reason, which is because they killed Mythal. He hadn't realized that all elves (except himself, apparently) would lose their immortality. Wanting to make up for it he intends to remove the Veil and free the Old Gods. What if, though, he still intends to devour them? The Old Gods are still corrupt so he wouldn't want them around. Likely, they'd be as weakened as he'd been when awakened.

I don't know where this could lead, but what if Solas is going to use something, maybe some ancient artifact found in Tevinter, to deal with the returning Old Gods. I'm not sure how else the return of the Old Gods could tie into Tevinter.

I dislike the Canticle of Exaltations principally because it was used by Drakon as the justification for his empire building on the premise he was spreading the Chant of Light as commanded by Andraste/the Maker. Also, if it is an accurate vision of the future then that pretty much confirms the Maker exists (which they maintained they would never do). That said, I had already picked up on this alleged prophesy as the reason people thought we were the Herald of Andraste and thus the end of the world was coming when the Maker and Andraste would return to cleanse the world.

The opening of the Veil as a baleful eye would seem to suggest the Breach which was circular like an eye. Thus why it was assumed that the female figure in the Fade behind us was Andraste and we were the Herald of her imminent return. However, as we know, that was a load of nonsense, the figure in the Fade was the Spirit of Justinia (or a spirit of faith mimicking her), the Mark of Andraste's favour (the anchor) was something bestowed by accident and the Titan that was awakened was soothed back to sleep by Valta. Even when awoken the Titan did not rise up and stride across the land.

If the "prophesy" was a bit jumbled then the "men who were beasts who warred with their brothers" could have been referring to the Witherfang and the werewolves infecting the Dalish of Zathrian's clan, which the Warden was able to stop either by reconciliation or killing one or other of the parties involved.

The Dalish have always taught that Fen'Harel prowled the Fade feasting upon the souls of the dead. The ancient ones who slept could also be the titans and since we have no idea precisely who the Old Gods are: Evanuris/Creators/Forgotten Ones/Titans - it could refer to them.

The nineth sacred mountain upon which rests the mortal dust of Our Lady, which "ascended whole into the heavens" sounds a lot like the Temple of Sacred Ashes at the end of DAI when Corypheus caused it bodily ascend towards the Breach. Considering when the Warden runs the Gauntlet, one of the trials is to pass through fire, this sounds even more like the Temple of Sacred Ashes.

The last part does make me think of Solas' professed plan, at least before he gave his orb to the wrong person, since he said his action would have resulted in the "fires of chaos". However, you also have to remember that it was also the belief of the Promisors that this world was so corrupt the only way for it to be cleansed was by fire and then be reborn. So where did they get their ideas from? Did they believe Drakon's prophesy or was it an earlier belief?

Were perhaps Drakon and the Promisors somehow having their thoughts influenced by a spirit from the Fade? At that time Mythal was still looking for a suitable host. So it is entirely possibly that she put these ideas into their heads as one of her "nudges" of history to get things moving in the direction she desired. Thus the person finally arriving at the gates of Minrathous may actually be Mythal rather than Andraste.

Morrigan is the inheritor of Mythal, so if she was to appear later to fulfil this part of the prophesy it would be as Mythal. It has also been hinted that parts of the Canticle of Shartan seem to be retelling an earlier folktale about Fen'Harel's rebellion against the tyrants of his time, so in that case the desire to reach the gates of Minrathous could be mirroring her desire to reach the gates of Arlathan. Since many Tevinter cities were built on the ruins of the elven empire, it is entirely possible that Minrathous was built on part of Arlathan, possibly even Mythal's domain in it. This could also account for why it has never been taken because of the magic which protects it.

So there are elements there which could be said to fulfil Drakon's prophesy but equally it may never come to pass or differently from how the creature that gave him the vision intended it to.

Would also point out that the terms Abyss and Fade were used interchangeably in that quest in DAI, whereas previously we had been given to understand that the Abyss = Void. However, the Fade and the Void are two completely different things. The Dalish call the Fade "the Beyond", whilst the origin of the Blight is Banalhan, the Place of Nothing, which sounds to me like another way of saying "The Void", which is where Andruil is said to have gone hunting the Forgotten Ones. Mythal does not seem to have had the ability to destroy the Void itself, only the memory of how to find it.

Also the quotation used in the quest is "Here Lies the Abyss, the Well of All Souls, from these Emerald Waters does life begin anew", which again points to it being the Fade. Also the Canticle of Andraste refers to the Maker as the Wellspring of All, yet in the Descent the inner sanctum of the titan is referred to as the Wellspring. So is the Maker a titan?

This is why seeing too much in any part of the Chant of Light is probably a mistake as it is possible to find references to many things we have encountered in it.

As for Sandal's prophesy, again he could have received some sort of idea of what Mythal/Solas intend should happen. He mentioned having been visited in his sleep by a scary lady who sounded a lot like Flemeth. Sandal seems a last survivor of the dwarves to whom she "gave dreams". Most modern dwarves do not dream but according to the verse in Trespasser apparently at one time it would seem Mythal did bestow this ability on them but at the price of cutting them off from the titans.

So, basically, all these prophesies are hints of what certain powers want to happen but it may still be possible to prevent it or mitigate the effects. Otherwise what would be the point if everything is already fated to happen?

I think you would enjoy this lore speculation from eravas on Reddit dragonage. Table of contents to whet your appetite:

Part I: importance of the Old Gods and Titans, origin of the Evanuris' godhood

Part II: Black City and the Abyss

Part III: behind darkspawn and Blights

Part IV: who whispered to the magisters

Part V: balance and the song of creation

We don't know how "destiny" works in DA, but the concept obviously exists, i assume the classics apply - can see/change other's destiny, but can't see/change their own.

Anyway i took a look at Maryden Halewell's songs, maybe the devs dropping hints through her songs?, tho it could be just me going crazy.

I will just link to the songs rather than making walls of text.
-----------
"I Am The One" is interesting, we first heard it in DAO in "Elvish", but it wasn't written by BioWare so it's not DA's Elvish, however it was translated in DAI.

It tells of "The One" that remembers everything and continues to live on, could be the Maker, Fen'Harel, Evanuris, Titans, The Forgotten/Forbidden Ones, etc.
What's begun
Is the war that will
Force this divide.

What's to come
Is fire and the end of time.
The divide could be about the creation of the Veil, another way to see it is the divide between the Elves and the rest of the mortals of Thedas as part of Fen'Harel's plan.
---
"Nightingale's Eyes" obviously about Leliana's role as spymaster and her ravens.
We're waiting
For someone to speak
And set us all free… free.
There's a parallel drawn here between Leliana and her ravens, - and Dirthamen, the keeper of secrets and his 2 ravens, Fear and Deceit, who are now without a master.
Possibly hinting at the return of Leliana and/or Dirthamen.
---
"Inquisitor..."
Now how do we follow
The battle is all but won
Peace can't last forever
Guard us from what's to come

Now you all shall follow
The breach is all but closed
Light can't last forever
Guard us from darkness to come
---
Of course the songs could be about current events and I'm just going crazy.