An ogre clan has dug in across the Riverglades and is “conducting some very questionable business”. Its outrunners have been kidnapping locals and attacks have been reported across the region; at night, weird chanting comes from the stronghold. Could it be cultists? Everything points to the Twilight's Hammer.
Blizzard hasn't published the bosses yet. We'll add them as soon as they're known (the beta starts on September 17).