Marandahir
Crown-Forester (he/him)
I just don't think WotC will spend money publishing a setting unless they can emphasize its own identity.I love different settings. It's what got me excited about D&D in the first place back in 2nd ed. And WotC will publish other settings for 5e because people are clamoring for them. But they also have a brand they are heavily invested in, and modern sensibilities to live up to, and for those reasons I don't expect these new products to convey differences like the old ones did. They're going to want everything to pretty much look the same as base D&D, with all the same core options and values, and a mild flavoring of the setting in question. I have no belief that WotC will reconstruct the old settings faithfully. The only advantage to publishing them at all i can see is opening the settings up to the DMs Guild, where the fans can do it properly.
Critical Role may be kitchen-sink fantasy like FR, but it's Critical Role. Greyhawk may have started it all (Blackmoor aside), but it's REALLY hard to sell it as why you should play in Greyhawk and not FR if you want Kitchensink High fantasy. And there just aren't the same number of fans clamouring to play in it the way Critical Role has. So the incentives are lower for Greyhawk than they are for exploring other parts of the Realms.