Harbingers

Harbingers is a series of animated shorts serving as a prelude to World of Warcraft: Legion. It features Illidan Stormrage, Khadgar, and. The first episode, featuring Gul'dan, was released at the "Road to Legion" panel at on June 21st 2016.

Descriptions
Harbingers is an exciting series of animated shorts bringing to life the tales of several key figures in the lead-up to the Burning Legion's invasion.

Step inside the mind of Gul'dan and learn more of his story, directly from the warlock himself.
 * Harbingers - Gul'dan

Discover the origins of Gul'dan in the first Harbingers animated short.

Join Khadgar in Azeroth's hour of need and return to Kharazan [sic].
 * Harbingers - Khadgar

Determined to find anything that will help him against the Burning Legion, Khadgar travels to an ancient tower and meets an echo of his former mentor, Medivh.

Follow the tale of an Illidari recruit and Illidan's elite corps of demon hunters as they prepare to engage the Burning Legion for the first time.
 * Harbingers - Illidan

Locations

 * Throne of the Elements
 * Azeroth
 * Deadwind Pass
 * Karazhan
 * Outland
 * Black Temple
 * Unnamed Burning Legion-controlled planet
 * Black Temple
 * Unnamed Burning Legion-controlled planet

Cast and crew

 * Doug Gregory/James McCoy/Marc Messenger - director
 * Jake Panian and Laurel Austin - art
 * Andrew Robinson and James Waugh - authors
 * Neal Acree - musical score

Retcons and inconsistencies

 * The official description of the Illidan episode states that the attack on Azgoth was the first time that the demon hunters engaged the Burning Legion in combat. However, in the World of Warcraft: Illidan novel, Illidan "wondered whether [the demon hunters] would survive the first battle" before stepping into the portal to Nathreza.
 * It is possible that there were several groups of demon hunters, for example seniors such as Needle and Varedis, and then trainees that traveled to Nathreza. Kor'vas may have been part of the first group. This may be supported by the fact that Vandel of the second group now serves Belath Dawnblade, a colleague of Korvas, as a scout, instead of being Belath's equivalent.
 * The description of the video mentions that the demon hunters were elite corps, indicating several potential groups of demon hunters.
 * Khadgar states that none has taken the role of the Guardian after Medivh's death. This indirectly first retconned Med'an's role of being a Guardian at the start of the war against the Lich King. Alex Afrasiabi later confirmed that Med'an's role as a Guardian is non-canon.
 * Gul'dan's video retconned away his being a member of the Shadowmoon clan and an apprentice to Ner'zhul from the official Warlords of Draenor character description (and Rise of the Horde). later consolidated the two and confirmed that the video's story also applies to the main universe, and retconned Rise of the Horde's depiction of Gul'dan's servitude to Kil'jaeden.