This appearance from Action Comics #1 was kind of sneaky, I almost missed it. Happens pretty late in the the book, when Superman is trying to stop a train crash:
And Green Arrow #1. She seems to be wearing a slightly different costume with buttons on the front (first panel)
And again in that button up cape in Men of War #1:
Unfortunately, these are all the comics I bought this week (other than Animal Man and Stormwatch which I already posted), so if anyone has any other images of Red Raven The Mystery Woman, please share them :)