The World of Warcraft comics started in the form of manga from Tokyopop. It started in 2005 with the Sunwell Trilogy followed the five part Warcraft: Legends and a series of stories focusing on characters of specific classes in the game. I've seen some of the previews for some of these but have not yet been able to read them. They are on my read list and hope to get to them soon.
|Sunwell Trilogy Part One|
This is a property that I think works well in comics form, the novels are great, playing the story out in game is endlessly fun but give me comic book set in Azeroth, in Outlands, in Pandaria and yes, on Draenor. As long as you you dig fantasy comics, you need to know nothing about Warcraft in order to enjoy these books.