After building a stadium I figured out it's basically just a low resolution 3d model of the stadium that you sort of 3d print layer by layer.
https://www.foco.com/collections/brxlz
Not nearly as nice as lego, but the final product is pretty cool.
https://www.core77.com/posts/126450/People-Easily-Fooled-by-...
https://www.instagram.com/lego_rick_/reel/C0HaaoRLNG9/
Sounds like an excellent way to validate demand then?
http://flatfab.com