Saw Ready Or Not earlier and honestly I'm starting to feel keen to side with Invader on this one. Samara Weaving would make for a killer Catwoman.
As for the comments about how much she looks like Margot Robbie, I'll say this: When I first saw the trailer for RoN, I legit had no idea that the lead actress wasn't Robbie. Going in and seeing the film proper with the knowledge that it was Samara in the lead role however, I was surprised at how the actress I kept thinking of for comparing her acting/physicality was actually Michelle Pfeiffer.
Samara looks like Margot Robbie, yes, but she has a different vibe about her as an actor that I think helps her stand apart from Robbie. If she were to land Catwoman, and granted I don't know how likely or unlikely that is at the moment, I think Samara would be more than capable of holding her own and having audiences come to understand it's her in the Catsuit, not the lady who plays Harley Quinn.