Update 2: Kotaku’s Jason Schreier, who broke the original story, has subsequently said that while a Diablo 4 tease featuring Blizzard co-founder Allen Adham does exist, his original report that it was going to drop at this year’s BlizzCon may have been off.
“What’s in dispute here is the timing,” wrote Schreier. “We had originally reported that it was planned for BlizzCon, but it’s possible that those plans were simply discussed and never solidified. (Either way, the video never happened). We can confirm that Diablo 4 is indeed in development.”
Update: A representative for Blizzard responded to IGN’s request for comment, saying, contrary to today’s earlier Kotaku report, that the company “didn’t pull any announcements from BlizzCon this year or have plans for other announcements.”