During the Credits
There are no extras during the credits of Dragon Age: Inquisition.
After the Credits
No matter what choices a player makes, the same extra scene is shown after the credits of Dragon Age: Inquisition.
The extra scene shows Solas meeting with Flemeth after abandoning the inquisition. The two are shown apologizing to each other and Flemeth collapses. As she falls to the ground, black mist begins seeping out from her body and entering Solas. The camera zooms in on Solas’ eyes which are now glowing blue.
This ending is a bit confusing and actually could mean one of two things. Either Flemeth is a vessel for Mythal, who came to her from the Fade/Beyond and has now taken over Solas’ body or there’s a chance that it’s the other way around. What is actually happening will likely be explained in future DLC or the next game.