According to Kotaku, Blizzard was originally going to announce that Diablo 4 was in development at the studio this past weekend during BlizzCon, but cut the announcement at the last minute. Blizzard Entertainment's sole Diablo announcement at the convention, revealing the mobile game Diablo Immortal, was met with vocal ire by portions of its fanbase, partially because the game simply wasn't the true sequel that fans had been hoping for - and, fans assumed, had been teased for months.
Blizzard's original plan, Kotaku reports, was to show Diablo Immortal and follow it up with a video of Blizzard co-founder Allen Adham teasing Diablo 4.
Blizzard reportedly changed their BlizzCon announcement plans for Diablo within the past couple of weeks, as they wrote on a Blizzard forum in October their plans for announcing Diablo projects "When the time is right". "These are very exciting times-we now have multiple teams working on different Diablo projects and we can't wait to tell you all about them. when the time is right", the company said.More news: Queen invites Meghan Markle's mum to royal family's Christmas celebrations
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Needless to say, Diablo fans anticipating a core game announcement weren't thrilled, causing a backlash the developer hasn't faced in a long while.
Diablo 2 producers and former Blizzard employee Mark Kern said the reveal of Diablo Immortal is an example of Blizzard "not understanding gamers anymore". Since then, new updates have been scarce, with an occasional new content patch arriving sporadically and a Necromancer character pack hitting in 2017.
With no word on a fourth proper Diablo entry, Diablo Immortal felt like a betrayal of the franchise to some and a cheap consolation prize to others. Blizzard has assured fans publicly that it has multiple Diablo games in development.