In recent years, Blizzard has been making a conscious effort to tie the storylines between expansions together and provide more cinematics and cutscenes for crucial moments in the story. Legion saw the rise of an ambitious storytelling project tracking 12 different stories across Class Order Halls, capped off by storylines introducing each new Allied Race. Now in Battle for Azeroth, we're unravelling the unity forged by battling against the Legion, getting two high-stakes storylines for the Alliance and Horde, which are both intended to make the player sympathize with their faction, as well as many factions and plot points from old expansions interwoven into the current conflict.
Recently Blizzard published "Three Sisters", an emotional look into the reunion of the three Windrunner sisters after decades apart. In addition to examining the family dynamics, this comic also propels other plotlines forward. Notably, Alleria's training with the Void in Patch 7.3 is not a neat detail regulated to Legion, as may have occurred had this taken place in earlier WoW expansions. Instead, the comic shows how Alleria struggles to keep the Void contained as she constantly hears dark whispers in her head, with hints pointing towards a conflict between the Void and Undeath, or Alleria losing control of the Void, in a future patch.