https://www.polygon.com/2017/10/7/16441036/overwatch-halloween-terror-2017-skins-leak-blizzard

Blizzard’s upcoming seasonal event for Overwatch, Halloween Terror 2017, kicks off next Tuesday, Oct. 10. But, as is common with Overwatch events, some of the game’s highly coveted legendary skins have started to leak out a bit early.

Overwatch Halloween Terror 2017’s new skins appear to have leaked out through online ads and other means, and have since been collected by the game’s subreddit.