During the scene of Reyes’ debriefing at the very ending of Retribution, Moira is shown among the Talon “operatives”.
Along with this, Moira has an interaction with Reyes where she says:
There are a lot of things you don’t know about me.
Guess who we think betrayed and set-up Blackwatch? :3
This is most likely because, per her Hero bio on the website, Moira’s involvement with Blackwatch was a heavily guarded secret prior to the Venice incident. She’s likely a point of contention in Jack’s inquiry because it’s safe to assume that Ana, Gerard, and the rest of Overwatch didn’t know that Blackwatch had her on the payroll.
Not to say that she couldn’t be the traitor, but it’s doubtful that’s why her picture is included in the first screenshot.
considering her personality and backstory, I theorize that she was receiving funding and resources from both talon and overwatch and and in return were supplying them with technology and such. Do yall think its coincidence that the talon assassins in venice have the shadowy shit that she gave Reyes?