Ladies and gentlemen:
I think it's fair to say that there were quite a few revelations and new information in the aforementioned "Trespasser" DLC. After playing through it, allow me to ask some questions and seek enlightenment from my fellow forumites:
1. We learn that the Elven gods and goddesses weren't always as such. They started out as war leaders, eventually becoming kings, queens and then, lastly, so-called gods. So, this begs the question: Who were the elves fighting? Is it a power that they themselves utterly destroyed? Or is that power still out there, somewhere else upon the world that Thedas is a part of?
2. Solas said that it was he who brought the Veil into being, thereby severing the physical world from the nonphysical world of the Fade. In doing so, he inadvertently destroyed the Elven nation(s), as they no longer had access to the source that powered their ambitions. But this, too, begs a question: Did Solas truly bring the Veil into existence, or did it already exist, but was "lifted" over the portion of the world that was ruled by the elves? I ask because Solas indicates that "lifting" the Veil once again will destroy the known world, rendering humanity extinct (and maybe Dwarves, too). But how is this possible? It's been indicated in past DA games that humans existed in the time when the elves were at the height of their power. Yes, humans were tribal back then, and therefore no real threat to the elves of that time. But, they existed, and they did have access to magic.
3. In the reference work "The World of Thedas, Volume 2," it's learned that there are lands — inhabited and not — outside of Thedas. To the east, across the Amaranthine Ocean, supposedly lies an idyllic land, but one's that's oddly empty. To the west, there is at least one nation, where dwarves live on the surface and are usually at the helms of ships arriving from that place.
Does this somehow tie into No. 1? Perhaps, the the ancient elven generals who fought that war so long ago, the one that would eventually see them raised to godhood, fight battles against peoples outside of continental Thedas? Is Thedas actually a world experiencing a Dark Age of sorts, after suffering some sort of calamity thousands upon thousands of years ago?
And how the heck do the Titans fit into this puzzle?
1. Assuming Solas' claims are true, it is hard to say who was involved in the first conflicts. It's possible that the evanuris themselves were the first war leaders against each other. Elgar'nan and Falon'Din come to mind. Mythal is said to have interceded and suggested they choose champions to fight on their behalf, and this was done to prevent war. So this may have been the beginning.
Then there are stories of some of the later evanuris messing with each other, like how Orlesian nobles play the Grand Game. Sylaise convinced a servant of Dirthamen to take the form of a dragon, which is reserved for "divine" beings like Mythal. He appealed to Mythal for mercy, but she denied it and let Elgar'nan judge him. The texts suggest that Elgar'nan messed him up but good.
Solas claims that Falon'Din once invaded Mythal's lands and started taking her followers, which resulted in her allegedly bloodying him in his own temple (though I think Dirthamen took Falon'Din's place in secret, tricking Mythal. Just my theory.)
Then there are the Forgotten Ones, who had always denied the divinity of the evanuris. They warred with them constantly. Allegedly, Andruil even almost fell victim to their schemes, until Mythal intervened again and sapped Andriul's power and made her forget how to get to the Void.
But perhaps before any of this there may have been a war with the dwarves. Supposedly the dwarves were once "little stones", though even in this story made of flesh. They were mindless, filled with nothing. They toiled under the mantra of the titans that made them flesh. Mythal came and slayed the titan. Perhaps the story is saying this is where bodies of flesh and blood came from. Mythal could then make bodies of flesh for the spirits of the Fade to inhabit. If so, then this was first, as the Vir Dirthara states that the Forbidden One Xebenkeck gave up physical form to flee to the furthest reaches of the Fade in the People's hour of greatest need. She did this to escape the "Earth", which could mean the titans. So maybe the titans didn't come first.
There also seems to be a period where the evanuris hunted mortal men. I don't know if this is referring to humans, or just elves in physical form.
But whatever the case, the last round of battles seems to be between the evanuris. Or so Solas claims. He worked to free the People from the false gods. The Forgotten Ones may have seen Solas as one of them because of this.
2. I have theorized on this too, and I think it's clear that the Veil existed long before Solas did. He merely discovered the Veil, just as Sylaise is speculated to have discovered fire. They didn't create it or invent it. They just figured out how to bring it forth. I believe that the world Solas remembers is one where the Fade and the Real existed parallel to each other, but had to be separated by something in order to exist parallel. That separating force was the Veil. The reason why the ancient elves and spirits were able to move from the Fade to the Real and create physical structures from mana is because there were connection points that crossed the Veil. The Crossroads was sort of like a nexus for these connections. I believe these connections were sort of like the Breach, but much larger and orderly structured. From Solas's perspective, this connection was the normal state of the world, ignorant to the fact that there was a point where the Fade stopped and only the Real existed. This boundary could be called the Veil.
It is clear that the Fade and the Real existed independently from each other during this time. The Vir'Dirthara gives an account of an educated spirit giving a lecture to elves and spirits alike about the unchanging world and how to manipulate it. The spirit clearly states that the Earth has gravity that makes fire resist running like water, or forbids stones from rising like mist. It says the Real has its own harmony.
And I believe this is why Elvhenan fell. Solas merely pulled the Veil in from its preset boundaries. Like how we open the dam in Crestwood and force the dragon to wake up because it was being drowned. It was a similar case with the elvhen kingdoms. Like the dragon, they relied on the preset conditions of the Veil staying away from where they were. When the Veil flooded in like water, they had no choice but to move from where they were. Like the spirit said, the Real has its own harmony. So when the Veil cut things off, part of the elvhen kingdoms stayed in the Real, and thus were destroyed by the fact that Reality doesn't allow such structures to exist. Where tiny spires of glass could hold giant spheres of metal when magic allowed it, Reality forbade such things from existing as they were. Fire could no longer wrap around trees like walkways. Instead it engulfed the trees and reduced them to ashes. Water could no longer flow through the air like beams of light. Now they run along the rocks and always run downhill, while also evaporating into the air, forming clouds and then collecting together to fall down to the rocks again in an ordered system.
So no, Solas did not create the Veil. He merely figured out how to redraw its boundaries without knowing it existed already. He is under the mistaken impression that he created it using his magic. No different from the first man of his tribe banging the right kind of rocks together and seeing sparks set a pile of dry grass aflame. The laws of thermodynamics existed before the man, just as the laws of the Veil existed before Solas.
However, just as the Real has a harmony, so too does the Fade. Just as how spirits cannot manipulate the Real with thoughts, physical beings cannot survive in a dimension made entirely of thought. Or at least, not for long. It was suggested that those in Inquisition were only able to exist in the Fade because of the Inquisitor's mark. But who knows? Maybe they can exist, they just can't change anything unless they have magic.
3. Don't take anything written in World of Thedas as fact. WoT is full of timeline and storyline errors. But in this case it happens to be right. There are other lands out there on the same planet as Thedas. I wonder if the Hero will discover anything interesting about the Veil in the far west. But it seems the evanuris activity was mainly centered around Thedas.
As for the titans, I think they are just a combination of rock from the Real, Fade energy (which turned the rocks into Lyrium), and spirits (either from the Fade or the Real that got trapped in the lyrium). So once the lyrium fills with enough souls (return to the stone), then the lyrium grows and develops a collective consciousness. Just a theory.