[danaris]

The Gold Box series of licensed D&D RPGs from SSI back in the early '90s actually did this quite well—you could create characters at level 1 in the first game in the series, and import them into each subsequent game intact except for the loss of a couple of game-specific magic items, all the way through the fourth entry (in the case of the Forgotten Realms series; the Krynn series only had 3 entries, but worked basically the same).

But this wasn't just the same company, it was, with some incremental modifications, the same game engine, and by the time the last entries came out, it was showing its age. There's no way you could have taken, say, a character—or even an item—from a completely different game like Ultima VI and turned it into an NFT that could then be added seamlessly into SSI's Secret of the Silver Blades. The two games, despite both being RPGs that came out the same year, are just so completely different that it wouldn't make any sense even if Origin and SSI did want to collaborate on making that possible.