Wizards of the Coast has released their D&D rules supplement,
Primal Power, as well as an epic-level adventure,
Prince of Undeath.
From the
official website:

New options for barbarians, druids, shamans, and wardens
Take
a walk on the wild side! This must-have book is the latest in a line of
player-friendly game supplements offering hundreds of new options for D&D
characters, specifically focusing on heroes who draw power from the
spirits that preserve and sustain the world. It provides new archetypal
builds for barbarians, druids, shamans, and wardens, including new
character powers, feats, paragon paths, and epic destinies.

This epic-level D&D adventure
is designed to take characters from 27th to 30th level. In this
adventure, the demon lord Orcus tries to usurp the Raven Queen’s power
over death using a shard of evil plucked from the depths of the Abyss.
Only the world’s most powerful heroes have the slightest hope of
stopping him.
This adventure can be played as a
stand-alone adventure or as the conclusion of a three-part series that
spans 10 levels of gameplay.