A goodbye letter to employees on the Activision Blizzard Website is a farewell to the troops from outgoing CEO Bobby Kotick. His last day with the company will be December 29th, since Microsoft's acquisition of ABK is now complete. Or as he puts it: "We are now part of the world’s most admired company," suggesting he thinks the new owner is Apple. There's a follow up on The Verge, which reproduces the text of an internal memo from Phil Spencer, CEO of Microsoft Gaming. This discusses the acquisition, thanks the outgoing CEO, and has an outline of organizational changes to align Activision Blizzard with Microsoft Gaming:

I’d like to thank Bobby—for his invaluable contributions to this industry, his partnership in closing the Activision Blizzard acquisition and his collaboration following the close—and I wish him and his family the very best in his next chapter.

With Bobby’s impending departure, we are taking the next step in aligning Activision Blizzard with Microsoft Gaming, by making the following organizational changes:

Thomas Tippl (Vice Chairman, Activision Blizzard), Rob Kostich (President, Activision Publishing), Mike Ybarra (President, Blizzard Entertainment) and Tjodolf Sommestad (President, King) will report to Matt Booty (President, Game Content and Studios). The leadership teams for Activision Publishing, Blizzard and King will remain in place, with no changes to the structure of how the studios and business units are run.