https://www.gamespot.com/articles/overwatch-patch-for-ptr-adds-new-map-and-more/1100-6455117/

The new Overwatch map announced at BlizzCon, Blizzard World, is now available in the game for some. Blizzard today launched a new patch for the game's PC-only Public Test Realm that adds the new map along with other bug fixes and changes.

Blizzard World is a map that takes the form of an amusement park for Blizzard games such as Warcraft, StarCraft, and Diablo. It's a new, hybrid-type map that blends the Escort and Assault game types. "Charge the gates of Stormwind, sneak through the Nexus Experience, and guide the payload through areas filled with high ground, flanking routes, and environmental hazards," reads a line from the patch notes. "Grab some Blizzard-inspired snacks at the concession stand along the way!"