No not allot of these characters work in other media without the hero they were inspired by in the first place. Robin had a show but only in Teen Titans but if it was just him all his own then it wouldn't last, same counts for Supergirl. I loved Laura Vandervoort as Kara to and thought they did a shitty job on her character I always liked the casting in that show but it's a shame they never do anything interesting with the characters. They made a big deal about her then kept writing her off or giving her amnesia. Still Kara should not have been on that show the younger generation of heroes started with Robin and Supergirl showing up bothered me. Laura was great but  maybe a teenager should have been cast to really hammer Clark was older and more mature than her.

I would so watch that.