This looks like lots of fun. Its time to saddle up and stick up for your crew! Ashes Deadlock Challenge is now live on PC, Xbox, PlayStation, and Nintendo Switch. Play and watch Overwatch from June 22 to July 5 to earn new rewards, including the new Legendary Ashe and B.O.B Skin.
Source: N4G PC Ashes Deadlock Challenge Comes To Overwatch