Batman raged as somebody dared to hurt Harley. That really pumped adrenalin into his veins. And that shoudln’t be happening. For he is Batman, the defender of justice and she is the queen of Gotham underground. This really can’t go together.
But Batman didn’t have time for this confused thoughts. Darth Vader turned to him, fear spreading around himself and the certainity, that nobody will escape. Batman resisted his worries and ran against Vader, with purpose to hurt him as badly as he can…