Teen Titans: The Judas Contract

Five years ago, the original Teen Titans (consisting of Dick Grayson as Robin, Roy Harper (comics), Wally West, Beast Boy and Bumblebee (comics)) rescue Princess Starfire (Teen Titans) of planet Tamaran from her captors sent by her evil older jealous sister Blackfire (DC Comics) who had staged a coup and forcibly took the throne. As she is no longer able to return to her world, the Titans offer her a home on Earth as one of them.