https://www.pcgamer.com/diablo-4-wont-be-at-blizzcon-according-to-new-blizzard-blog/

For the last two years, the lead up to BlizzCon has ushered in a new round of Diablo 4 announcement rumors. And the rumors are back in earnest this year, of course, but this time they've been prompted by some pretty compelling evidence: the release of the BlizzCon showroom floor map. 

In contrast to the 2017 BlizzCon layout, Diablo is set to occupy a large and central area of the convention centre this year. Meanwhile, shortly after the opening ceremony, a panel dedicated to the future of Diablo is scheduled.