The mural at the end of the teaser (and at the top of the blog) shows a circle surrounding the red lyrium Idol. There are 7 lights on the left side of the circle. Well, 2 lights, and 5 unlit or extinguished semispheres where lights would be.
I think it's safe to say that those 7 "lights" symbolize or represent something. I have three theories as to what.
1. The Old Gods:
This one's obvious. Five Old Gods are dead, two are left. Five unlit/extinguished lights, two lit lights. The only problem is I can't figure out why they would be in that order. The two lit lights should be at the bottom, or the top. So either the position of the lights is random (highly unlikely) or there's some order to them which we can't know yet because of how the Old Gods relate to the idol (if they do). Still, I prefer this theory over the other two - it makes slightly more sense.
2. The Magisters Sidereal:
There are also seven Magisters Sidereal, and (at least) two of them are dead*. So, the two lit lights could be for the dead magisters, and the unlit lights are for the living ones.
I've come up with a possible reason for why the lit lights would be in that position, if the lights represent the magisters. But it's pretty out there. It's probably just a coincidence, but if you list the magisters alphabetically by their titles, Cory is always in the middle. This means that whether you start from the top or bottom, he is one of the lit lights.
For reference, these are their titles, listed alphabetically: 1. Appraiser of Slavery; 2. Augur of Mystery; 3. Architect of the Works of Beauty; 4. Conductor of the Choir of Silence (AKA Cory); 5. Forgewright of Fire; 6. Madman of Chaos; 7. Watchman of Night.
So if the light on the top left (next to the big shadow wolf) represents Appraiser, the lights for Conductor and Watchman are lit. Or if Appraiser is on the bottom, the light for him and Conductor are lit.
There's a codex entry which describes one magister killing and eating another. Since we don't know their identities, the dead magister could be anyone aside from Cory and the Architect. Thus, the one that got eaten could be Watchman or Appraiser.
As I said this is probably just a coincidence, but who knows.
3. The Evanuris:
Not counting Solas and Mythal, there are 7 Evanuris. I have no idea why only 2 of their lights would be lit up, though. The only reason I think this might even be a possibility is that the elf could be Mythal and the shadow wolf could be Solas, which would put all of the Evanuris on the mural (in a sense).
So what do you think? Do you think the lights represent one of those groups? Or perhaps something else - and if so, what?
*Yes, I realize the Architect could be dead too. But he also could be alive. Maybe if the mural appears in the game it will have 3 lit lights if the Architect is dead (assuming it relates to the magisters at all, which it might not).