Sources: Blizzard Pulled Diablo 4 Announcement From BlizzCon
by Jason Schreier on Kotaku, shared by Tom Ley to Dea from Deadspin > Sports News Without Fear, Favor or Compromise on (#42ACJ)

When Blizzard's sole Diablo announcement at this year's BlizzCon turned out to be a game for phones, it set off a firestorm of angry reactions from fans who had hoped for a new Diablo on PC. As it turns out, Kotaku has learned, Blizzard had originally planned to tease Diablo 4, but pulled those plans at the last"