Harley was really interested in. Reanimation of dead people, that’s the shit. She completely forgot about Batman and revenge as she was deep within own plans creation. To have an army of practically indestructible soldiers, what villain wouldn’t like that?

They travelled for a long times, hundreds of kilometers. Harley was planning to rule the world, therefore she didn’t notice a dark shadow behind her and the red flash caught her attention for the very last moment, just in front of her.