Well, given that the DMG has a fairly full (as in, about as much detail and info as the original Folio) presentation of Greyhawk as a Setting to run Campaigns, thing is newer players in the past two years have been primed to be open to borrowed Greyhawk nostalgia by WotC.
I mean, granted as far as it goes, I don't see any of that as a reason to not suspect this could be for Season of Champions. I would expect either a full veto of this material or adoption close to as is, not much back and forth.
As someone who finds the results intriguing, if not even promising, I do think it worth taking then with some grain of salt as partial and somewhat obscure. But I would have said the same thing about ICv2 at any point, while taking it seriously as a source of some information.
My main caveat...
Yeah, honestly I have doubts that "being a Lich" will make it through UA: if they wanted to explore the mechanical approach, really think they ought to have started with a less extreme narrative example.
All over: the Moonsea city states, particularly Zhentil Keep and the expansionist Zhentarim are present threats, and there is a giant Megadungeon that is like if you made Lothlorien into Moria, filled with tons of threats as well as loot.
The Sword Coast and the Dalelands are part of the same region, the Heartlands.
More specifically, Shadowdale and Waterdeep are the locations of Greenwood's multi-decade home games, so that is where the deepest detail is actually found.
Vanilla is not bland, it is just the extremely popular default. The Dalelands is definitely "Standard issue D&D" as it gets...but people like standard issue D&D High Fantasy.
Yeah, I was thinking that they could put these options in with that Astarions material reformatted to match. Along with many less explicitly sinister Paths.