Exploring NFT Expansion Packs

One of the interesting components about NFTs-as-media is that most of them can be programmed. This opens up the possibility of adding additional features (new visuals or functionality) to them in the form of expansion packs. This can either be officially licensed, or in the case of permissible licensing (creative commons), be freely remixed and played with by community members. I want to explore what expansion packs could look like.