I do know it'll include info derived from both 1st & 2nd ed , plus what other sources I have access to. I'll need to convert some classic monsters such as the Fimir & Zoats . oh the Jabberwock too. I was disappointed that they were trimmed from the setting with 2nd ed. I'm also including the Gods of Law (especially Soltan) & Malal (sp?) the other Chaos God prior to the release of Realms of Chaos cut him from the game. I'll also try to include various regional Gods that weren't included or replaced with other Gods in 2nd Ed.
Still need to find any official or unofficial resources on Cathay, Nippon , Araby & Kingdoms of Ind for the setting. So far I got a map from Beastmen of Chaos Armybook that helps on locations.