Leave, Founder of Blizzard Entertainment Has Completely Officially Left!
Co-founder of Blizzard Entertainment, Mike Morhaime has officially left the company in October 2022. He has left the company he built from scratch.

As a replacement, J. Allen Brack will fill the position left by Mike. Allen himself is a former Executive Producer of World of Craft. Mike isn’t actually gone completely, he still holds the position of Strategic Advisor until April 2022.
“As previously stated, on October 3, 2022 Michael Morhaime entered into an agreement with Activision Blizzard Inc, whereby he will provide strategic advice to the company on the basis of his capacity as Strategic Advisor. Morhaime’s work as a Strategic Consultant at the company will end on April 7, 2022.” quoted from Blizzard.
Blizzard Entertainment, a division of Vivendi Games, is an American computer game developer and publisher headquartered in Irvine, California.
Source: Gameinformer