If you were worried whether or not BioWare will release any additional content to Dragon Age: Inquisition any time soon, worry no more, for Mark Darrah confirmed DLC is in the works via his twitter.
If the official website is to be any indication, Xbox One and PC will get the new downloadable content or contents before Xbox 360, PS 3, and PS4, as the website states that "Premiere Add-On Content Coming to Console First on Xbox One".
No more details are known at the moment, and thus it is not known whether it will be a story-based DLC, or maybe more of an item pack.