BlizzCon 2017 saw the announcement of a new Overwatch hero today. Meet Moira. She's a new Support character that has floating orbs, the ability to blink, and more. I assume she will be added to the game in the weeks ahead, but it doesn't seem like there is a clear release date for her just yet.
Moira launches a rebounding biotic sphere; she can choose between a regeneration effect that heals the allies it passes through, or a decay effect that deals damage to enemies.

Moira quickly teleports a short distance.

Moira channels a long-range beam that both heals allies and bypasses barriers to damage her enemies.