But back to the main discussion, I think it's pertinent to decide whether this hypothetical world is one that had RPGs that developed before D&D did in 2020 (And if so, which one came first then, because those concepts would likely dramatically inform pop culture. Imagine a world where Tekumel was the first RPG?), or one that had no RPGs until D&D came out in 2020. Because that makes a world of difference in the stage our new D&D creation steps onto. For my part, I think it has to be a world without RPGs. Because with RPGs already existing, it seems impossible that we wouldn't have seen a fantasy tabletop RPG prior. And from there, the cat is out of the bag.