premise: The Overwatch World Cup 2017 is an "Overwatch" eSports tournament, organized by Blizzard Entertainment, the game's developer. It features 32 represented nations from around the world, with the final tournament taking place at the Anaheim Convention Center from November 3-4, 2017.
hypothesis: The tournament was organised by the game publisher.
reason: Blizzard Entertainment is the publisher for Overwatch.