I'm loving this thread... thanks all!
I just finished my playthrough, and though I liked the game overall, I loved everything surrounding Flemeth/Morrigan/Kieran... but that post credits stinger really threw me for a loop!
Here is my contribution
On the is Solas an old elven god question;
More fuel to the fire, but at the Well of Souls, I actually offered Solas the opportunity to take the power of the well for himself. His response was an abrupt "No, and don't ask me again" (paraphrased). At the time I thought it was odd, and totally out of character. I was expecting him to object since clearly the devs wanted either the Inquisitor or Morrigan to take the well (with Morrigan the more interesting option imo) but I figured it would be a long winded speech about responsibility, etc... After the post credit sequence it's clear he simply didn't want to be bound to Mythal.
I think those looking to Greek/Norse myths are on the right track. Clearly Solas is modeled on Loki, which would make sense if you pay attention to pop culture. I also think we need to be careful about figuring out what the nature of a god even is in DA... I think it may be more akin to an ancient Pharaoh... some kind of living god-king who learns the secret of immortality through magical research.
I also tend to think the original Darkspawn may have been elves (much like the original Orcs were Elves in Tolkien lore). Maybe Fen'harel is also an analog for Lucifer/Morgoth as well.
Fun to speculate!