Heroes of the Storm, Blizzard Entertainment's popular MOBA, is officially joining other Blizzard games like StarCraft, as the studio is no longer adding new content to the title. Moving forward, Heroes of the Storm will only enjoy occasional patches, hotfixes, and balancing changes.

source https://www.windowscentral.com/gaming/pc-gaming/heroes-of-the-storm-entering-blizzard-purgatory-no-new-content-planned