You'll be able to access the new content from the Core City during the mid-game and later, so you don't have to finish the game or start a new one if you have one running.
Styg, so what happens with the story line? I was under impression that this expansion was going to continue into north underrail...This is something completely different. Are you working on the story line expansion as well? when can we expect it around?
The most important question there is. I double that
We currently do not plan to expand the main storyline through a DLC. And when I say main storyline, I mean the C*** stuff and the main actors in relation to it.
What plan to do, however, is expand the world and lore to reveal more information that pertains to this storyline and its events.