I see it as the Inquisition defeating Corifeus (it was also mentioned that the pack of wolves in a earlier drawing is the Inquisition and I agree) He would finish depicting the victory before leaving; this is less odd to me than painting the situation with Flemeth before knowing the orb is broken.
I don't know, he can't know for certain we'll win.
This specific wolf looks a bit dragonish and fiercer and since dragons & gods go together I assumed it's Solas.
The dragon looks like a dragon's foot to me, it may indeed not mean killing Flemeth but perhaps some other thing? Plus, what made us decide that he'll approach Flemeth only if the orb is broken?
Also, I sort of refuse to buy it's that simple XD, since this appears post-credits I figure it is a way to give us hint us of what happened, like the conversation with Cole.
It's incomplete and therefore seems like BW wants us to fill the blanks (they're evil like that).
I thought they might have done it to mess with us.
