The events of the cataclysm has caused two new races to seek new allies. The Goblins for the Horde and the Worgen for the Alliance.
Deathwing once again sought the services of the goblins, as slaves. Unable to refuse such an offer, the goblins were enslaved by him. A large group have resisted however. With their previous homes devastated by the cataclysm, they escaping to an island off the coast of The Barrens. As they strive to recover, they come across an Orc captured on an Alliance ship and rescue him. The Orc turns out to be none other than Thrall himself, and in return offers the Goblins a place within the Horde. These events are carried out in a quest line, allowing players to experience first-hand the reasons behind the Goblins' shift from neutrality.
The cataclysm has cracked open the Greymane Wall, finally revealing what has happened to the kingdom of Gilneas and its citizens. With the Worgen curse taken hold, they have found a partial cure, allowing thme to retain their Human minds even when transformed. Venturing forth from Gilneas and seeking help from the Alliance, they have decided to join them, to combat the new threats of Cataclysm.
Gilneas will make extensive use of the phasing system (much like the Death Knight starting area), to show what happened while the kingdom was cut off from the rest of the world and lead up to present day.
Worgens will have two forms, a Worgen form and a Human form. Players will be able to customise the look of both forms.