We didn’t pay this one much attention during Blizzcon since 90% of it was about other Blizzard properties, but Fmulder points us to a version of the Blizzard publishing panel, edited to only show the 5 minutes that focused on Diablo III stuff.
There is sound, but it’s very low so you have to turn up all your volume settings to make it audible.
The first three minutes cover the Book of Cain which Metzen flips through on stage while talking about the new and improved *cough recton cough* Diablo III origin lore. The next minute covers the Sword of Justice comic book. The last 30 seconds or so is a brief mention of The Order, the first Diablo III novel.
We posted news about that a couple of months ago, when the book was first listed on Amazon.com, though it wasn’t even titled at that point. Now it is, and it’s called “The Order,” a name that apparently refers to the Horadrim). The book is by Nate Kenyon, whose previous work has been more horror than fantasy, and from what they say during this bit of the panel, it sounds like that’s the theme of this book as well. If a darker, grittier novelization of the Diablo world is your thing, it sounds like you will be in luck.
The full panel can be seen here.