What do you think the new Overwatch event will feature?
It show files on the Historical Overwatch event, along with the line: Initiating archive declassification...
It also adds the fans should retweet the information, so it could be that more details will be revealed following a certain amount. The official account just tweeted that date along with a video mentioning the Overwatch Mission Archives and King's Row Uprising.
This is Overwatch's most recent limited-time campaign, following February's Lunar New Year event.
The King's Row Uprising took place seven years before present-day Overwatch, when an extremist group of Omnics calling itself Null Sector launched an insurgency in an upscale neighborhood of London. Either way, the event will feature more than 100 Loot Box items, and a co-op brawl telling the tale of Tracer's first mission. Past year there was Talon Widowmaker, Blackwatch Genji, and McCree as well as Overwatch cadet skins.
It's possible that the 2018 Uprising event will mimic the one from 2017. A team of Doomfist, Moira, McCree, and Genji traveling around the sewers of King's Row (or somewhere entirely new) could be awesome. We don't have much to go on, but thanks to it being a reoccurring event, we probably know about what to expect.
Blizzard has confirmed that this event will return, giving players a chance to play it in case they missed out on the mission (as well as skins) during its first debut.