Before anything else happened,Overwatch voice actresses Jennifer Hale (Ashe), Lucie Pohl (Mercy) and Carolina Ravassa (Sombra) freaked out at a BOB in the audience. He couldn't have been hard to single out, and since BOB looks like a friendly Cyberman whether Cyberman had beards,mustaches and cowboy hats.
That should disclose you something approximately how things were going to go down on the Live Stage.
Source: blastr.com