I doubt I am the first person to mention this, but I have not noticed it here, and before I begin my laboratory work for the day...I would like to see a massive reboot of the evergreen Castle series along the lines of the City modular sets. What has been really awesome about the City modular buildings is not only the detail, scale, and numbers of minifigures, but also that they are all tied into a single program. This is how I see a reboot of the evergreen Castle series -or- take your pick, medieval fantasy or a Kingdoms continuation (because I cannot be the only person who got SUPER pumped when the Joust set came out with a falcon shield, hoping classic factions were in fact getting a reboot).
Some of this already exists on Ideas in the form of town elements (i.e., Medieval Market, King's Rest Tavern), like some of you have mentioned, but I would suggest that it very well could be done on a larger, more integrative scale. How I am thinking about this is that like City, there exists a line of castle products (or Nexo Knights) for a younger demographic, but that once or twice a year, a large and moderately expensive "modular" set is released. Taken with the right long-term vision, the products would compliment one another to create either a large medieval city with commoner, elite, and specialized buildings -OR- larger castles that reboot the classic factions as component parts of a large kingdom. I grew up on the classic factions and love the detail of Kingdoms, so my mental template for this is of course taking the Kingdoms detail at least one step further. However, a reboot of 2007 Castle with fantasy elements would also work well.
