Blizzard announced on October 6 the launch of a new season of Reign of Talon. Major changes include the Doctrine support hero, the Watchpoint: Grímsvötn escort map, and the Mystery Madness: Graveyard Games event.
The seasonal announcement also announced the transfer of Sombra to a support role and the reworking of Roadhog with a new ability, Trash Compactor. In Graveyard Games, the hero and new powers are determined randomly. The full range of seasonal offerings appear on a schedule, so an announcement does not mean that every item in the store is already available. Before playing a rated game, study the current descriptions of the changed heroes in the client.
Sources and checks
Overwatch Reign of Talon - Season 5: A Grim Doctrine Now Live! · Steam