Former Territories of the Evanuris

I notice in the bottom picture that for every gold/silver disc there is a corresponding dark one. Now this was painted to represent ancient times, I think, so before any of the Old Gods were slain. I wonder if the theory is correct that the Old Gods aided in creating the Veil and sealing the Black City, with each one corresponding for an Evanuris to counter their power, so it is not possible for them to break out until all the Old Gods are dead. I go back and forth on whether the Old Gods are an aspect of the Evanuris/Creators because Solas maintained he banished the latter forever. Shutting an aspect of them in the Deep Roads was only a temporary banishment at best and able to be by-passed without destroying the Veil entirely.

I'm more inclined now to feel that the Old Gods equal the Forgotten Ones. There are seven of them to counter the seven Evanuris. They were said to be allies of Fen'Harel and he persuaded them to return to the Abyss in order to defeat the Creators. Maybe they did think this was only temporary and he did trick them into becoming imprisoned too.

The Abyss can equal the Void but also the lower levels of the Deep Road. Since the ancient elves believed the Forgotten Ones lived in the Void and Andruil was able to hunt them there, that points to either the lower Deep Roads or some part of the Fade, the uttermost depths, where it is dangerous for ordinary People to venture. This could account for why Andruil needed the Armour of the Void to allow her to enter. It is also known as the Banal'han, place of nothing and origin of the Blight. The Blight is also called the Darkness. If the Void is an alternative Fade, then Falon'Din was also said to be able to walk there without fear but that could equally apply to the darkest depths of the Deep Roads.

The latest trailer shows the Black City changing on the creation of the Veil. It seems as though part of its purpose was to contain the corruption away from the rest of creation. This would fit with Solas saying that he needed to stop the Evanuris from destroying the whole world. Were those imprisoned/maintaining the prison already tainted, or did the corruption spread to them, possible when the seal was broken by Corypheus? Was the Golden City only a reflection of another physical place where the true origins of the Blight lay? It retained an illusion of gold until its secret was discovered.

Who urged Corypheus and Co to break into the city and why? If it was Dumat, had he worked out this was the only way to free himself? Did he want to release the Blight or was he not aware of its presence in the city? Maybe he promised Corypheus a golden city because he genuinely believed that is what he would find.

Why did all the Old Gods fall silent after the Black City was discovered? Dumat is the God of Silence, so I suppose that would not be unusual but did he really have the power to silence the other gods? However, if it was the act of breaking in that caused the Old Gods to become corrupted, then they would be driven to madness by it and no longer answer except by their song. That song that calls to corrupted creatures would suggest the Old God/Arch-demon wanted to be found.