I have a similar game interest. Something based on internet sourced data, e.g. gpt-3 based npc dialogs, trained off current news or something else that's never ending... something like kenshi with the complex mechanics of dwarf fortress, combined with NPCs that can very realistically mimic conversations

It would be an open world, but not pvp...maybe you support co-op but I think the novelty would lie in single player combo'd with a very dynamic cause and affect world