Fan Casting "The Six Villains" in Batman: Prison of Hell

After Thomas Elliott killed himself by detonating a massive pipe bomb inside Arkham Asylum, with Bruce and Selina escaping the building before it completely collapsed, we cut to Deathstroke watching the news on the collapse of Arkham, before he turns to his five other comrades and asks, "Is it time yet? Is it time for us to kill the Batman?"