I'm for it but a ton of things have to change.
Firstly, if this is largely a samurai based concept, the peace sign has to go. As culturally it has a different significance in Japan as in America. Which leads to my second thing.
Why a baseball bat and peace sign? Those are time specific in certain periods, so how is that she's doing something where for hundreds of years will not exist?
The feet are also a problem, either someone else is under that skirt, or Batman has broken every bone in her hip and leg to do a pose like that.
The Joker summoning is very unnecessary as a base and kills it. Which leads me to question why XM goes for ridiculous bases at time.
Tattoos are another time sensitive and culturally specific thing, but I won't lie; I do like the idea of Harley and Joker with tattoos. Even more so, it still has a ton of flaws.
I do like the face and if she has alabaster skin tones, I'm all for it. The outfit is also cool. For now, it's a total pass.