Parmandur
Book-Friend, he/him
Not necessarily. I'm just not sure how well Gygaxiana would resonate with the contemporary crowd. Some "kids" might like Greyhawk, but others might be off-put by the kingdom of Geoff and hex-maps. It may even be that WotC feels similarly about the Forgotten Realms, and feels like Magic settings, OGL era settings, and Mercer's world are more relatable.
I'm not knocking Gygax or Greyhawk. I like Greyhawk well enough, and even have a special place in my heart for it, even if it isn't my favorite setting (Of the early settings, pre-2E, Krynn was probably my favorite). Heck, a lot of my artistic and musical tastes are from bygone eras (e.g. I love 70s funk and fusion jazz). I just think we shouldn't project 40-50-something nostalgia onto modern sensibilities.
They've already put out an extensive Greyhawk regional book, that even rebooted the timeline to the original box set. They said at Game Hole Con that the Setting aspect of Ghosts of Saltmarsh has been well-received, so...never say never.
The Forgotten Realms has a ton of Setting books: the Adventure books are dripping in bits of the Setting, as desired. Keeping the global status vague helps keep their options open, and keeps the books useful for people using other time-frames. There was that DMs Guild project that came out last year that got into detail on Baldur's Gate in the 3E era, for instance.