https://www.gameinformer.com/2018/08/02/overwatch-summer-games-returning-august-9

Blizzard has announced that the Overwatch Summer Games, the annual summer event that tends to have different themes each year, will be returning on August 9.

The first year, the Summer Games had an Olympic theme, with characters donning the outfits of competitors in various summer Olympic sports. Last year, it was more of a summer vacation theme, with Soldier 76 manning the grillmaster outfit and Widowmaker getting beach wear. 

We don’t know what the theme this year will be, but from the tweet, we can at least tell that Lucio Ball will be returning once again. The soccer-like game premiered during the first Summer Games event, then returned with improvements last year. We will probably get more details over the next week, plus reveals of the new skins.