I like the overall look and design for her costume. Though I echo the sentiment that there's too much blue in the lower half. Should have a red belt, red boots, or some kind of red piping/lining on the front of the legs. But other than that, I like it and I'm curious to see it in motion in a trailer.
I also agree that both her hair style and costume evoke Lara Kent from the Injustice storyline. It's so obvious that I doubt it's a coincidence. So I'm hoping she is indeed a version of Lara Kent, daughter of Superman and Lois or even Superman and Wonder Woman. I could see Keaton Batman's world being a dystopian world similar to Frank Miller's TDK storyline. And in that storyline, Superman and Wonder Woman did have a daughter, whose name was also Lara.