Merry Christmas to my favorite thread! Here's more random speculation, sorry if it's been discussed before and I missed it.
During the balcony scene Solas says: 'You show a wisdom I have not seen since- *pause* - my deepest journeys into the ancient memories of the fade'. That pause is just long enough that I think he meant the Inquisitor reminds him of a real person from long ago. Could this by Mythal?
Also, if the Inquisitor drinks from the well of sorrows, we get this possible conversation by picking the 'I'll trust my friends' response:
S: You think to share your power, to avoid the temptation to misuse it. A noble sentiment, but ultimately, a mistake.
I: Why?
S: Because while one selfless woman/man may walk way from the lure of power's corruption, no group has ever done so.
I: I trust my friends.
S: I know that mistake well enough to carve the angles of her face from memory.
If Solas is speaking from personal experience, then maybe he's referring to the elven pantheon as a group corrupted by power? Some folks seem to think it was Elgar'nan who betrayed and murdered Mythal, but what if it was one of the goddesses, like Anduril? That might explain the 'her' in Solas's last comment.
He mentioned of the legend of Falon'din in the temple..said he was power hungry that he would create oceans of blood of people who wouldnt bow low. After that he was killed by his own brethren.
When Lavellan says he deserved it. He is like dont underestimate the power of a God. He might have not truly died yet.
I feel maybe one of the other elven gods might be out there for revenge too..