I'm also currently fleshing out my 4e Greyhawk campaign, set in the year CY 691. This allows the setting to more naturally integrate the new core races and establish their cultures. I'm also a big proponent of Greyhawk's awesome array of villains, which no other setting can match.
- In the early 600s, shortly after the fall of Iuz, the Elemental Princes of Evil united their forces and waged a war upon the entire world of Oerth. The War of the Princes lasted for many years until they were finally brought down by the sacrifice of many of the world's greatest heroes. Their Iron Cube-Fortress of Acheron destroyed by the artifact known as the Bringer of Doom. Very few knew the true purpose behind their war, and those few who did learn of it, swore never to speak of it.
- The Dragonborn were exiles from the Elemental War from the distant west. Their great houses fractured, many settling into Ket, Furyondy, Veluna and the new Shield Lands, some of their more ambitious ilk to the Hellfurnaces and the new empire the Fire Giants were raising there.
- Iggwilv is Greyhawk's marquee villain now. She recently completed her apotheosis to a true goddess after having stolen a portion of Demogorgon's power in the aftermath of The Savage Tide. After Iuz lost most of his holdings in the Reckoning War, Iggwilv supplanted her son (who now serves her as a general along with her daughter Drelnza) and now rules from a growing empire that is based in the Howling Hills. Fortunately, the invasion of the Abyss by the forces of Hell keep most of her attention away from Oerth... for now.
- Any territory claimed by Iggwilv's forces is displaced her abyssal holdings and those who are born in these lands are born Tieflings if they are not true demons already. Many tieflings have fled these lands though and over the decades have scattered across the continent, predominantly in Neutral or other Evil held lands. After Iggwilv sacked Mitrik and destroyed the Crook of Roa, no tiefling is permitted to set foot in Veluna upon pain of death.
- St. Kargoth has returned with a retinue of Death Knights with dreams of raising the Aerdy Empire once again. He has also sworn vengeance against Iggwilv for her involvement the destruction of his master.
- Lord Kas has also returned, now master of Citadel Cavitus (a floating necropolis/fortress from Vecna Lives).
- Eclavdra has seized her opportunity in the advent of Lolth's lessened interest in Oerth of late. Over the last century, she has crushed the other houses in Erelhei-Cinlu and formed alliances with other powerful races of the deep realm. Her city is now a vertitable metropolis and is in the midst of negotiating an alliance with Iggwilv.
- Graz'zt openly supports Iggwilv, but in secret fears her power which now exceeds his own. The fact that she has not made a bid to claim more of the Abyss for her own means she has even grander designs in motion. Graz'zt uses Tuerny the Merciless to subtly undermine her on Oerth and learn what her plans truly are.
- The Domain of Greyhawk has expanded over the recent years with the rise of the new Lords of Greyhawk. They have annexed the Duchy of Urnst and even territory in Western Nyrond. They now control the entire southern Nyr Dyv with their eye fixed on claiming Dyvers. An enraged Furyondy contemplates annexing Dyvers themselves "for their own good".