As for the Titans series, I come back to the MLK Principle. If she was the best applicant who tried out for it, who am I to complain about it? I mean the character is an Alien so that leaves a lot of leeway as to who they cast for it. The problem is that the comics don't portray her as Black. Furthermore, I think it has more to do with the fact that Comics or Animation going to live action rarely, if ever, works out well in the end. Ex: Avatar Last Airbender