https://www.pcgamer.com/overwatch-second-anniversary-event-confirmed-free-weekend-incoming/

The Overwatch Anniversary Event that leaked yesterday is now official. Beginning on May 22 and running until June 11, Blizzard will celebrate Overwatch's second birthday with more than 50 new items, including eight new Legendary and three Epic skins, new dance emotes, and a brand-new Deathmatch map called Petra. Deathmatch is also getting a new "Competitive Mode" for the anniversary event, complete with placement matches, skill rating tiers, and leaderboards.   

With the new comes the old: Cosmetics and dance emote from last year's anniversary event will also return, as will previous seasonal brawls, including those in Overwatch: Archives, which will rotate through the Arcade on a daily basis. All previous seasonal loot will be included in loot boxes during the event, and everyone who logs in to Overwatch during the second anniversary celebration will receive a free Legendary Anniversary loot box.