In their blog, Blizzard has announced that there will be 3 more animated series devoted to Overwatch heroes. The next one is Alive. This how developers describe the upcoming episode:
"Alive weaves a tale of Widowmaker, the peerless Talon assassin who stalks her prey with deadly efficiency. In this episode, we spend a fateful night in London's King's Row—where you'll discover how one death can change everything."
If you've missed the previous episode devoted to Winston's story, you can watch it here: