Batman's abstention from killing is one of the central elements of his character. However, don't expect to see that rule followed in DC Universe's upcoming Titans. By the time the upcoming streaming series starts, Batman will have already broken his no-kill rule.
“Batman is a killer and Robin wants to get away from that,” actor Brenton Thwaites told IGN at the Titans premiere on Wednesday. “The idea is that he doesn't want to become a killer himself. And although these guys that he's fighting are bad and they deserve, you know, they deserve what he's dishing out, it seems, he believes that when you kill someone you crossed the line and you become almost as bad as them, so it’s pretty clear in the series that he was with Batman, Batman crossed the line and he was teaching me to do the same thing, and he’s trying to break away from that.”
The tension between Batman and Robin has been since the show's first trailer, which contained the now infamous "f*ck Batman." A promo for Robin last month revealed that Dick Grayson left Bruce Wayne's care because he felt that he was becoming too much like him. Thwaites' statements seem to indicate that Robin hasn't killed anyone at the onset of the series and that killing is the act that ultimately drove a wedge between the two characters.
Debuting Friday, Oct. 12, on the DC Universe streaming service, Titans stars Brenton Thwaites as Robin, Anna Diop as Starfire, Teagan Croft as Raven, Ryan Potter as Beast Boy, Alan Ritchson as Hawk, Minka Kelly as Dove and Lindsey Gort as Amy Rohrbach.