Each show was spawned by different media. Batman started as a comic book character that progressed to radio, movie serials, TV. Then the big screen.
Speed racer began on TV, then progressed to comic books and the big screen.
Green Hornet started on radio, went to comics, movie serial, TV, and finally the big screen.
Useless trivia: Bruce (Batman) Wayne had an older brother, Thomas Jr. Thomas had brain damage and spent most of his life in a sanitarium.
Britt (Green Hornet) Reid is the grandson of Dan Reid, nephew of The Lone Ranger!
