Damn beaten to the punch

Was distracted by news.
One thing that caught my eye was the
Plane of Dreams, I wonder what will come from there.
Also, this; "This world may be
Abeir-Toril, Athas, Eberron, Krynn, Oerth, or a world of your own devising." Now they may simply have listed off some settings, but perhaps it is a hint at what is to come. Obviously; Abeir-Toril and Eberron we already know about. But the mention of Athas could mean Dark Sun is coming, Kyrnn could mean Dragonlance is coming and Oerth for Greyhawk (but I think this was already known).
They mention to before their example of how the cosmology is strucutred in 4e; "Here are a few suggestions." So I wonder if they will list more then one style of cosmology perhaps show for those who want say Great Wheel how to fit that in, etc.
It appears under the excerpt from Open Grave that Nerull was once the ruler of death and Raven Queen was his successor.
Tiamat being statted out could be our first glimpse of what a full on god is like in 4e, in terms of power-level.