Steam store page shows map not in game

I was just noticing Foundries and Forges is a gif on the steam store page but not currently in the game, can we expect to see this map soon?

Oh wow, you're right!  I don't think I've noticed that gif before.

I did hear there might have been some datamining relating to that map...

hall of court
servants quarters
Castel armory
foundries and forges

i think they all The first Dlc maps

I miss the Armory.  Was one of my favorite maps in DD1.