Via the German PS Store:
Yesterday a streamer, Laced Up Lauren, received a package from Blizzard including some special goodies hinting at some new content themed after the Rio Summer Olympics, including skins, sprays, and possibly a new map and/or game mode set in Rio.
Celebrate Overwatch’s inaugural Summer Games with special Summer Games Loot Boxes—available for a limited time*!
Each contains four items, at least one of which is guaranteed to be a Summer Games skin, spray, highlight intro, emote, victory pose, player icon, or voice line. There are more than 90 Summer Games items to collect—they’re are not available for purchase with in-game credits, so Loot Boxes are the only way to claim them.
If your Summer Games Loot Box contains an item that is already in your collection, you will instead receive credits, which can only be used to unlock non–Summer Games items.
*Summer Games Loot Boxes are available to purchase or earn in-game until 8/22/16 at 11:59pm PT.
Clear images of the sprays and possible Rio map can also be seen on her twitter: https://twitter.com/LacedUpLauren/st...47299037884420
At present it's not clear how these alternate lootboxes will be obtained in-game, but it seems that the new content will likely be patched into the game during today's maintenance.