While we have the Stone, I think we're missing another deity - the Sun. The legend goes: "Long ago, when time itself was young, the only things in existence were the sun and the land. The sun, curious about the land, bowed his head close to her body, and Elgar'nan was born in the place where they touched. The sun and the land loved Elgar'nan greatly, for he was beautiful and clever. As a gift to Elgar'nan, the land brought forth great birds and beasts of sky and forest, and all manner of wonderful green things. Elgar'nan loved his mother's gifts and praised them highly and walked amongst them often. The sun, looking down upon the fruitful land, saw the joy that Elgar'nan took in her works and grew jealous... Eventually Elgar'nan threw the sun down from the sky and buried him in a deep abyss created by the land's sorrow... Humbled, Elgar'nan went to the place where the sun was buried and spoke to him. Elgar'nan said he would release the sun if the sun promised to be gentle and to return to the earth each night. The sun, feeling remorse at what he had done, agreed".
As it often happens with myth, we should look past metaphors. But I assume, that this "deep abyss" may very well be the Void, where the Sun, humbled, defeated and jealous, has to return each night. Then we have this part, where Elgar'Nan is Eldest of the Sun. Meaning, there may have been other children, and I think they are the Forgotten Ones, born in the Void after the Sun's defeat.
Now we also have history, repeating itself in Thedas, the very same pattern happens over and over again.
Firstly, Tyrdda's story. I will not repeat Liz's analysis, but I ship her interpretation about Thelm being Dirthamen, and that the Golden City is Arlathan, and he wants to take it for himself. He fails miserably, kills Mythal while she's dreamsexing in the Fade with Tyrdda and so on. Then something FH themed happens, all elven gods go radio silent. I'm very sceptical about The Betrayal legend, mostly because of how Solas reacts to it, when mentioned by Morrigan in the Temple of Mythal. We also know from codex, that The Dalish use "harellan" to mean "traitor to one's kin," but the word does not appear in any elven text before the Towers Age. It may be that FH actually tried to save his kin by sealing them away.
Secondly, here comes Black City assault thingie. We know, how it goes. It is heavily implicated, that the blood ritual, needed for that, happened in Kirkwall. Elven slaves were brought in there by the thousands to work the stone quarries, and Corypheus's Memories tell us he needed elven blood to enter the Fade. Anyways, something went wrong with this too, because the Black City is still out there, shut tightly, and presumed Old Gods also went radio silent for the time being. Funny coincidence, no?
And then we have our Andraste. Her father was the chieftain of one of the largest Alamarri tribes, so she may be Tyrdda's descendant, with dreamer abilities. And she saw the Maker in her dreams blah blah, then he invited her to join him at his side. It sounds painfully familiar, let me cite Tyrdda's stanza: ""Be my bride and cross the Waking, eat the gilded city's fill". This was also covered by Liz, so just a remider. Point is, she marched to Tevinter, my guess - to use Kirkwall as ancient magisters did, to enter the freaking Fade.