Chaosmancer
Legend
...that was my point to begin with.
I must have missed your point then, because "we don't know what it will look like" seems to be a pretty solid defense against some of the things you are worried about.
You would be wrong on both thoughts here, so everything in your next paragraph is incorrect. Also kind of strange, because the writer/worldbuilder who was creating this hypothetical chapter would be writing and editing, and having other editors going over the chapter, probably multiple times before publishing, so of course it wouldn't be like a video--and I almost never watch gaming videos; I much prefer text.
Ah, another advantage I forgot. Since there are going to be multiple editors going over the chapter, having a single, solid concept with clearly defined edges is much easier. I've tried world-building with a team, it gets messy fast.
Well, you're correct in that I feel using an old setting would have a downside, and that downside would be it would make many new DMs compare their homebrew attempts to a published setting that has had up to 50 years of work going into it (Greyhawk is a lot more than just the village of Hommlet and it's surroundings, after all). There are going to be a lot of prospective DMs who spend one or more hours following the directions, only to be disillusioned when they think they're going to have to do that a hundred more times to get their own version of Greyhawk or the Realms or whatever other setting they like.
Whereas with a new setting--even if this setting is never used for adventures or anything and is purely for this chapter--that baggage won't exist.
This doesn't make sense to me. People who are going to compare their homebrew to official settings are going to do so anyways. I have never read a world-building chapter in the DMG focused on Greyhawk... but I compare my work to Eberron constantly. Or to settings from fantasy novels. Also, you think a new setting made by professional game designers and creatives won't STILL cause people to look at their own work and feel inadequate? It will, trust me.
And sure, there are going to be people intimidated by the scale of a setting that needs an encyclopedia. Trust me, I am painfully aware of that. But, if they already know about the Forgotten Realms, showing them Fosal the new setting TM isn't going to make them less intimidated by the Realms. After all, we are talking about a setting chapter focused on Greyhawk, and the Realms causing a problem, which is the same problem that will be had regardless of the setting in the chapter.
Now, this isn't to say that the chapter shouldn't include things like "every first draft sucks, it is okay" or "even the greatest settings started with a single page of notes, size comes with time, don't stress about it". Those are great things to include and I would relish their inclusion... but I don't understand why you think the chapter focusing on Greyhawk means it cannot do that, but if they made Bodal the new setting TM they can totally say those things. I think you are feeling more like this chapter is going to be "look at Greyhawk, the wonderful setting" and less "here is how to world-build using examples" and I don't get why you think that is the case.
Also, the bit you wrote, about the dragon-sun and the vampires from the moon? That would actually be a good sidebar in this chapter. Not to build a world around those ideas, but to say "It's OK to to toss out the lore from the MM in order to do cool things in your setting." Because there are too many people who think you have to stick exactly with what the books say and are crippling their ability to have truly unique worlds because of that.
Sure, but WoTC is also completely correct in the assumption that this example world-building chapter is going to be used whole-cloth by DMs and players. Remember, the DMG from 2014 had a chapter on making your own race, and used the Eladrin as a demonstration... and very very few people made new races, and a lot of people used the Eladrin was written with no changes.
So, since we know players will use this chapter whole cloth, it has to have room for the standard lore, because it would be rather silly of them to make a setting that they expect new people to use, that conflicts with the lore from the monster or player books.
Is it still a good sidebar? Of course it is. But the point wasn't about sidebars, it was about how the setting would be made.