Warcraft
In 2004, Blizzard Entertainment moved the series away from the real-time strategy genre and released "World of Warcraft", a massively multiplayer online role-playing game (MMORPG). Requiring a subscription fee to be paid to play, it also introduced regular additional content to the series in the form of patches. "World of Warcraft" gained popularity worldwide, becoming the world's largest subscription-based MMORPG in 2008. The game reached a peak 12 million subscribers worldwide in October 2010. "World of Warcraft" has had seven expansions as of 2018. During the production of "", Blizzard co-founder Frank Pearce stated that "If there's a team that's passionate about doing another "Warcraft" [real-time strategy], then that's definitely something we would consider. It's nothing that we're working on right now, we have development teams working on "", "", "Diablo III", and when those teams are all off the projects they're working on, they'll be intimately involved in the discussions about what's next".
BlizzCon
"Hearthstone"'s third adventure, "League of Explorers", was announced on November 6, 2015, which was later released on November 12. Overwatch was announced to have a Q2 2016 release date, later confirmed for May 24. The expansion "" released its cinematic trailer and announced a release date on or before September 21, 2016 and was playable. The Warcraft (film) released its first official trailer and revealed its release date of June 10, 2016. "StarCraft II" was announced to have upcoming single player mission packs, "Nova Covert Ops", which each consist of three missions.