So Red Lyrium seems to suggest that somewhere, a Titan is corrupted. I wonder if perhaps 'the void' is actually a term for the space within a Titan.
Flemeth's daughter, Yavana mentions that Great Dragons are the life blood of the world. This DLC suggests Titans. The Old Gods are still buried beneath the earth, and being sought out by the corrupted darkspawn.
I do not think either statement is incorrect, I just wonder how it all fits together.
An additional thought. Because it seems likely that a Titan is corrupted, thus creating Red Lyrium, then Lyrium itself is not the cause of the blight as some theories have speculated. It just seems to be a very powerful transmitter of it.
One thing that is interesting is this: - All the things that seem to be missing from the world [Elven immortality, direct connection to the Fade, Dwarven connection to their Titans, Great Dragons] seem to be heavily tied to magic. Then something happened to sever all of them. I wonder if something out there specifically targeted magic and tried to remove it from Thedas.
Hence, the great 'betrayal' that Flemeth talks about ? Flemeth on Mythal: "She was betrayed as I was betrayed, as the world was betrayed !" In the opening of Dragon Age Origins, in the cutscene, you see a tree being blackened and fading away. The tree is the symbol of Mythal.
That point, Mythal murder coupled with something else, seemed to spark some major reactions in Thedas. Worse still, it appears that the beings responsible for them are still around. If not Mythal would not be working for few thousand years for vengeance.