https://www.pcgamer.com/the-overwatch-summer-games-are-coming-back-next-week/

Blizzard put out the word on Twitter last night that the 2018 Overwatch Summer Games will kick off on August 9 and run until August 30. 

Blizzard didn't say what special sorts of excitement this year's summertime sporting event will bring us, but I'd say it's a good bet (especially given that image) that the 3-on-3 soccer-styled Lucioball brawl will be back, and I'm reasonably confident that we'll see new skins and cosmetics, and a return of at least some of the items from previous events. New skins in the 2017 Summer Games cost the standard amount for event skins (3000 gold), while 2016 skins were a third of that price.