In The Burning Crusade, the arakkoa of Skettis had pretty much fallen entirely into evil, but in Warlords of Draenor we see them at a crossroads. They're outcasts, hated and oppressed by the flying arakkoa who are torching their villages with an enormous beam weapon fixed atop Skyreach. To make matters worse, the Shattered Hand orcs have begun expanding into the region, killing anyone in their path. These arakkoa outcasts are caught between several enemies, and they really have nobody on their side before you show up.
Over the course of the zone, you're helping this shady resistance group of cursed arakkoa to make their final stand. You're learning about the curse they bear, the ancient gods of their land, and the very real threat posed by the Adherents of Rukhmar, the ruling caste of zealous arakkoa in Skyreach.
I don't know about you, but I'm fairly certain allying with the cursed arakkoa is going to come back to bite me in the posterior, but that's a song we adventurers have sung before. Also, I don't know who decided to let the goblins start up an expedition to Draenor, but I'm calling it now - huge mistake, guys. Huge mistake.
Head on over to the official site now for the preview.