File:BlizzConline key art.jpg

Summary
The BlizzConline key art.

Consists of the following characters (from top left):
 * Deathwing, representing Heroes of the Storm
 * , representing Diablo
 * , representing Overwatch
 * , representing Hearthstone
 * , representing StarCraft
 * Bolvar Fordragon, representing World of Warcraft

Source
https://blizzard.gamespress.com/Blizzard-30th-Anniversary