There is, I don’t quite get why people think there isn’t? They’ve been hinting at a deeproads/darkspawn DLC for months and they’ve said in multiple interviews we’re going to get some kind of DLC that wraps up some things related to Solas.
The dev's can’t actively talk about what they’re working on for various legal reasons so for the love of all that is Holy can people please stop taking their relative silence as “there’s no more DLC coming” or that their focus is purely on DLC like spoils of the Avvar.
The developers never confirmed a DLC related to Solas. It's been hinted about in a circuitous way, but not confirmed. Expecting one, or acting like one is guaranteed, is a recipe for disappointment if it doesn't happen later.
There is more story DLC coming, but we have no idea what it's about at this point.