According to Johnson, “We expect materially lower financial performance this year. 2018 benefited from the release of World of Warcraft: Battle for Azeroth, whereas we are not planning a major frontline release for Blizzard in 2019.” What’s interesting is that based on this statement, it seems that Blizzard might not consider the upcoming release of “Diablo Immortal” to be a major release.
Given that Blizzard seems to be done with the current storyline of StarCraft, and there doesn’t seem to be plans for a new Warcraft RTS anytime soon, nor a sequel/expansion for Overwatch, we suppose Johnson’s comments make sense. Blizzard seems to be going through a bit of a turbulent time at the moment where they have laid off quite a bit of their work force.
They have also been facing a lot of backlash from fans over the content in games such as World of Warcraft, and the lack of a Diablo 4 announcement probably did not help either.