User blog comment:Ultimate Heatblast/Wanted Characters/@comment-99.182.125.235-20120424013149/@comment-1038387-20120424205233

Jason Todd was among Beast Boy's theories to Red X's identity in the series (along with evil twin, long lost brother, clone, and I think one more.) It was never confirmed which one it was, if one of those at all.

And Robin started out as generic Robin, but it was only later changed to Dick Grayson.