http://dnd.wizards.com/elemental-evil

Called by the Elder Elemental Eye to serve, four corrupt prophets have risen from the depths of anonymity to claim mighty weapons with direct links to the power of the elemental princes. Each of these prophets has assembled a cadre of cultists and creatures to serve them in the construction of four elemental temples of lethal design. It is up to adventurers from heroic factions such as the Emerald Enclave and the Order of the Gauntlet to discover where the true power of each prophet lay, and dismantle it before it comes boiling up to obliterate the Realms.
And it will also be the next D&D Board Game:
In the Temple of Elemental Evil board game, you play as a heroic adventurer. With amazing abilities, spells and magic weapons, you must explore the dungeons beneath the Sword Coast where you will fight monsters, overcome hazards and find treasure. Are you ready for adventure?
The Temple of Elemental Evil board game features multiple scenarios, challenging quests and cooperative game play designed for 1-5 players. The contents can also be combined with other D&D Adventure System Cooperative play board games, including The Legend of Drizzt and Castle Ravenloft.
Oh and new minis:

Collect all 44 figures from Elemental Evil, the newest set of randomly sorted monsters and heroes in our exciting new line of D&D miniatures, Icons of the Realms.
Bring the world of the Forgotten Realms to life with these new miniatures from the Elemental Evil storyline. Wage war against prophets, monsters and elemental creatures to thwart their devious plans to wreak massive amounts of havoc upon the Material Plane!