I still think a Forgotten Realms update is most likely for 2024 (at which point SCAG becomes "Legacy Content"), but since some Eberron options have yet to get the post-Tasha/MOTM treatment, I can't rule this out either.I'm starting to wonder if the 2024 "revisited" Setting will be a new Eberron product, say a Sandbox Adventure in Xen'drik with lot of local color and a large bestiary updating the Monsters of the Setting, and new versions of Warforged and Deagonmsrks to fit the new Race & Background Feat Tree regimes...and maybe Dominaria next year for the Magic 30th Anniversary.
Of course, we may see both...