On the heels of releasing Module 7, Turbine's posted this:

The Grand Masters of the Twelve are preparing their ancient ritual to breach Shavarath's magical barrier blocking passage into the vast and mysterious depths of underground caverns. The heroes of Stormreach amass to help them! Join us here for updates on the progress of each server, as the citizens of Stormreach battle to gather the ancient artifacts for the Grand Masters. Which server will be the first to reach the finish line, and venture into the depths of the city? Check for updates here starting June 6th!

You can follow your server's progress on the official forums, here.