In a new behind-the-scenes video released today, Blizzard reveals that Orisa will be available in Overwatch on PlayStation 4, Xbox One, and PC on Tuesday, March 21.

Here’s what to expect from Orisa:
Orisa serves as the central anchor of her team, and defends her teammates from the frontline with a protective barrier. She can attack from long range, fortify her own defenses, launch graviton charges to slow and move enemies, and deploy a Supercharger to boost the damage output of multiple allies at once.
Abilities

Fusion Driver – Orisa?s automatic projectile cannon delivers sustained damage, but slows her movement while she fires it.
Fortify – Orisa temporarily reduces damage she takes, and cannot be affected by action-impairing effects. Halt! – Orisa launches a graviton charge which she can detonate, slowing nearby enemies and pulling them towards the explosion.
Protective Barrier – Orisa throws out a stationary barrier that can protect her and her allies from enemy fire.
Supercharger – Orisa deploys a device to increase damage inflicted by allies within her line of sight.

In a recent AMA on Reddit, Game Director Jeff Kaplan revealed that Winston is the least picked hero:
I am looking forward to seeing how the barrier changes play out from the PTR once they go live. We’ve seen that Winston in the hands of the right player – like Miro for example – can be amazing.
I think going too overboard with Winston buffs on the...