October 24, 2011
The final Diablo III panel of Blizzcon 2011 was all about the making of the Black Soulstone cinematic. The panel featured seven people from the cinematic team all with different job responsibilities, and it was a very informative session. You can watch the whole hour-long panel now, right on top of our Diablo Wiki article on the panel. That article has a lot more than just the video, of course. I typed it in real time, went back to edit and fix it up later, and inserted a ton of screencaps taken right from the high quality live stream.
October 21, 2011
Blizzard has posted the Black Soulstone cinematic which premiered during the Blizzcon 2011 opening ceremony. As Chris Metzen said, this version is slightly edited (to remove some story details) from that which we’ll see in the game. It’s got story info galore as it is, with Leah facing Azmodan in some sort of dream/vision/nightmare, where the Lesser Evil shares his plans for global domination.