For this to be useful, you'd need an infrastructure-- standard APIs and formats for interchange. I'm picturing the initial sell as like those old Pokemon event

For this to be useful, you'd need an infrastructure-- standard APIs and formats for interchange. I'm picturing the initial sell as like those old Pokemon events or trading via the link cable, but you could buy a Trabant P601 from Gran Turismo, Zhongli from Genshin Impact, and Messi from FIFA21 to drop into the game too. How do you make use of that sort of open-ended diversity without ruining gameplay? You'd either be limited to trivial uses (avatars/skins or randomizations) or you'd have a huge vector for feeding in game-breaking items and characters. The alternative is a closed network-- only allowing a small selection of pre-vetted NFTs that won't break the game, which adds very little value over something like the Skylanders/Infinity/Amiibo concept that already exists, except you don't get a cool figure too.