So, Lego has a thing where you can propose sets. If you can garner support for your idea, it may become an official set.
Someone proposed a Dungeon Master pack, with all the stuff for a D&D style fantasy dungeon crawl. Skeletons, goblins, witches, and wights, with a few valiant heroes to face them, it's a set designed to give all the props and pieces you'd want for high fantasy.
It already has a fair amount of support. Like most LEGO set lines, if it does well it will likely expand. This is one of the few predominantly scenery sets that isn't a castle or a city, and therefore appeals to me super hard for the possibilities
I hope that it gets support, and they do expansions and variations, such as a cyberpunk business sprawl, navigable spaceship interiors, Victorian streets, or prohibition speakeasy.