I was watching some older Ghil Dirthalen theory videos and saw this mural in one of them.
Those eye-like things in the middle have always drawn my attention but we haven't been able to come up with explanations for them. There's fourteen of them, and we haven't had anything that there's fourteen of before.
Well now there's fourteen statues involved in Solas's ritual, two of each Evanuris that he locked away. They're even arranged in the same sort of arcing shape, with a sphere below them.
(Side note, there are three statues here that are of "Beetle" aka the Evanuris that's on the right at the end of the gameplay trailer, but Ghil Dirthalen stated in (if I remember correctly) this Split the Veil episode that it's a mistake, meaning there's supposed to be two of each Evanuris.)
This makes me think that this ritual is very much a reverse of the one he used to create the veil in the first place, and he needed fourteen statues for that one too. I always kind of suspected that mural was a depiction of Solas creating the veil, and I think this pretty much confirms that.