https://www.polygon.com/2018/3/29/17176928/overwatch-uprising-event-start-date-2018

Overwatch’s Uprising event is back for a second round in April. Starting on Tuesday, April 10, the Uprising brawl will be live, again focusing on the history of Tracer and the Overwatch crew.

There will be more than 100 loot box items to unlock that further reveal the stories of the original members of Overwatch, according to Blizzard. The co-op brawl will again be set at King’s Row, a pivotal moment in the Overwatch lore that made its first in-game appearance during last year’s big event.