Do I have any pictures? Nope! But retailer solicitations went out recently that have a Construction Yard and a bunch of doodads like walls and turrets and things you can build during extended campaign games!
It’s part of a campaign system, not geared toward any specific mat (as far as I can tell). Basically, you can fortify your cities as the campaigns go on. Hopefully it’ll also let you put rubble and/or buildings back into play on Disintegrated foundations!