Overwatch's Year of the Rat will allow you to unlock seven new skins. After the announcement of Sombra's Legendary skin, different leaks appeared with skins for Moira, Brigitte, Lucio, Doomfist, Winston, and finally Hammond.
All of them represent a character or are related to a mythical figure of Chinese culture. Some of them will have to be unlocked in loot boxes or bought, while others will only be available once you've successfully completed the weekly challenges.
Legendary skins (3,000 Credits)
Rare skins (available in weekly challenges)
The event will be launched this morning around 10:00 am (PDT), after a short maintenance. A new patch — already available on the PTR — will be deployed with balance changes on Mei, Baptiste, Orisa and Hanzo.