Okay so people freaking out about the stitches, it's just Cass's costume with the mouth piece torn off.....really not that hard to see that....I'll admit the colors, smirk and pouches really seem to point towards Stephanie, but I guess that could also be Cassandra cause of the slightly tan skintone, I'd say that's not 100% Caucasian but idk.
I have my theories since they're bringing Bette back into the Batwoman fold, but so far, I think Cass might keep it, she's just now changing her costume, becoming even CLOSER to Oracle and embracing her "wayness"