Light Versus Dark
The Bat is a good guy, but he doesn’t exactly radiate sunshine, cupcakes, and happiness. He isn’t a character that exudes ‘light’ per se. Deathstroke is essentially a mirror image of the Dark Knight – just a little eviler and lethal. It’d be a fun match-up to see, though, since they’d probably cancel each other out in combat. That said, Dick would be far more suited to feud with Slade in the DCEU’s new model, which focuses on good overcoming evil, i.e. light versus dark.
Trained by Batman, Dick has all the necessary skills and experience to kick some serious butt. Unlike his mentor, however, he isn’t driven by darkness. He’s a happy guy and isn’t afraid of enjoying life while juggling his superhero duties. His quest for justice isn’t out of guilt, but more out of it’s the right thing to do. It’s admirable.
As polar opposites, the dynamic between Dick and Slade might work better than the one between the Bat and the assassin. Our hero needs to face what seems like an insurmountable challenge, where he’ll fall but get back up again and overcome. He needs to show that giving up isn’t an option and the bad guys will always fail in the end.