I actually have 2 reasons to believe this, and I hope I make sense with this:

• Overwatch 2 has released heroes on a Hero->Villain alternating basis. Treating Soujourn as our first OW2 hero, we had Soujourn-> Junkerqueen-> Kiriko-> Ramattra-> Wifeleaver-> Illari-> Mauga. Illari is the only outlier of this trend, since shes more of a ‘neutral’ as of right now with no (?) official alignment, mostly just doing her own thing and her lack of connection to existing lore is honestly my largest gripe with her but thats another post… So following this trend, Venture after Mauga seems like a good person already, and Space Ranger would be the baddie.
• The other reason I predict this is that as of right now, it is not possible to build an ‘All Talon’ team in Overwatch 2 Role queue. 1 Tank is filled by Sigma and soon Mauga, DPS has Widow/Reaper/Sombra to pick from. Support, however, only has Moira. Baptiste is NOT Talon anymore, so he doesnt count as an evil support. A second villainous support would both add a new layer for heroes to play as, but also allow completing an ‘Oops All Talon’ team.

I also think her design has some ‘evil-ish’ implications, but thats more speculative; Purple in Overwatch is overwhelmingly associated with villains, so her purple hair immediately stood out to me. Coupled with her face being more of a glare than say, heroic healers like Mercy and Brig. But those are weaker reasonings.