Overheard my kids, one of them had some group project in school and the other asked who they had ended up in group with. After hearing the names, the reaction was "they are good, none of them will use AI".
So as always kids that actually does something in group projects doesn't want to end up in a group with kids that won't contribute. Difference is just that instead of just slacking off and doing nothing they will today "contribute" AI slop. And as always the main lesson from group projects in school is avoid ending up in a group with slackers.
LLMs famously can't be consistent, so your fantasy game would have story arcs that doesn't fit together, brings back characters that are already dead as if nothing happened, and everyone would have a son named Dorian.