Parmandur
Book-Friend, he/him
The 70's Greyhawk OD&D supplement is in the book, butnit has close to no Setting information about Breyhawk, mainly its new Class and Monster material.We do know some original edition Greyhawk material will be in it, maybe that will count, maybe not.
But if Greyhawk can be condense into 32 pages without ruining the setting, then that could do the job in the DMG as well.
I'm also interested in the cosmology chapter, like will it contain more Spelljammer and newer cosmological content like mentions of the Astral Sea, Wildspace, Astral Dominions, Radiant Citadel, etc...? Any mention of MtG as alternate Cosmology choices?
Here's the thing about condensing Greyhawk to 32 pages: the original actual Greyhawk book was a 32 page module, basically a map and a booklet in a folio. 32 pages isneven condensing the Setting, that's the standard core. Evwm the longer box ser is largely superfluous additions like weather rolling charts. A single chapter in the DMG is more than enough to get everything Gygaxian in the Setting, which is the real deal.
Cosmology will play. Alot into what they've done in Spelljammer and Planescape, no doubt, and provide similar tools as the 2014 DMG most likely in terms of Planar rules.