Resurrecting this marvellous thread!=)
Well to just add ingame support to my seeing the likeness of Arlathan and the Black(once Golden) city:
In the Dalish Origins...
*SPOILERALERT!!!!!!!*
When at the mirror, Whatshisface yer companion talks of what the mirror shows him.... A city UNDER GROUND *note underground, the Black city has skies* with a darkness spreading from it... And the beeing then sees him and forces him to keep staring... Probably thus getting the link needed to get Darkspawn through the mirror into the cave and onward...
That city could well be The "sunken" elven first City... Or a Dwarven one true, but the "Darkness spreading from it" makes that less likely since that hints of an origin, and they didn't originate from a dwarven city since they assaulted the Dwarven citys, makes sense no?

And The Presence is Obviously an Archdemon... Or THE archdemon maybe in this case...
And yeah, about the People becoming darkspawn bit... Play said Origin and meet whatshis face Your companion as a shriek at the ambush of yer camp... *not quite done but still named Shriek, not ghoul*
So even if they state that Different Broodmothers spawn said darkspawn they DON'T say that that's the ONLY way they get created... They actually hints that they thought they were ONLY made by tainted prisoners at first, before they discovered Broodmothers...
And if the Old Gods are the source of Magic, who taught it to the ancient elves? They only communed with the creators, until they got trapped together with the evil ones by their own Dread Wolf...
Another Chantry lie there obviously...
And well, as always, just my view, not canon! since BIOWARE HAVEN'T MADE ANYTHING CANON so stop writing as if they HAVE stated YOUR views as set in stone please...
They say "This is what they believe *elves* and this is what they believe*Chantry* then some think this *Dwarves*" etc etc... Just because they make a document doesn't mean they say THIS IS WHAT WE SAY IS TRUE! they just make a nice additive that could exist INGAME aswell...
And make note that ingame, most documents in the Codex is written by , yep, CHANTRY historians...
They probably are as likely to want the truth as Medieval Church people was...
*heresy! Burn the witch!! Kill the Blasphemer! Crusades aginst the heathens!*
Vs "Exalted marches against everyone not believing in the maker in Dao world!"
*enjoys the awakening of an intersting subject HOPEFULLY without silly smearing or trolling etc*