BlizzCon is an annual convention held by Blizzard Entertainment to celebrate their major franchises: Warcraft, StarCraft and Diablo. The 2009 edition, featuring a live performance by Ozzy Osbourne, was held on August 21-22. General information BlizzCon first started in October 2005, held at the Anaheim Convention Center where it has been held since. Some features included the announcements of release of new content for their franchises, previews of content for upcoming games, and Blizzard devel… (More on Blizzcon)