Note from Winston: The following letter was found in Angela's office. It appears to be written by the dark persona Angela mentions in her journal, and was written on November 11th, the day before the fall of Overwatch.

At last, Preparations are complete. I've acquired the last asset for the attack. It's cute how she thought to give him so much power, then just let him waste it. I'll make sure to take full advantage of it.
It was so easy to capture him too! All I had to do was play a recording of Angela screaming and he burst through the door, right into my trap. A bit of chloroform and he was right out.
Now that I've properly armed him and put him under the same brainwashing treatment I gave Mrs Lacroix, the plan can finally commence.
Overwatch stands as a shining beacon of hope and peace for people around the world. They seem to think that they'll take care of everything, that they can just hold out for a hero to come. It makes me laugh. What a weak and pathetic mindset. One can only truly rely on themselves.
That's where I come in.
I'm going to bring them down, and show the world that they can't rely on their heroes. They'll see their heroes infighting, see them fall. It'll break their spirits. Especially Angela's. And if I break her, then I can take over permanently.
Everything's coming together perfectly.
Oh, and Angela? if you're reading this…
You're too late.