I was arguing about elves with Solas as a Lavellan and he says:
"Inquisitor: Someone who spent half his life in the Fade has no ideas?
Solas: Not unless we colapse the Veil and bring back the Fade here so I can casually reshape reality, no."
Well, sh*t.
Take this and the end credit, and we do seem to have the next antagonist. (Not sure how I feel about it, honestly. Despite his occasional condescension, Solas was intriguing, a much better character than I expected. Of course, we then learn that pretty much everything that happens in DAI is a direct consequence of his earlier actions...)
I did start to wonder about his remarks though: sure, he says the elven people need him. But he doesn't seem yearning for the "glory days" (tells Dorian I think that Arlathan was civilized, but ultimately corrupt, etc.) Not sure how weakening the veil would fit with this. Especially if the veil had been created to seal off the elven gods of old (not confirmed, but I think there's evidence to support this).