User blog comment:Steelspur111/Thoughts on a TV Special/@comment-32451936-20180222153801

I don't think you need a TV Special to introduce new characters to your series. Better to introduce them in the series itself. But you can establish Nion' parents in the story and then develop it further in the special like The History of Trunks movie. But there's no reason why characters in the special can't appear in the series also.