He doesn't have to be. He was main character that started the launch and was pushed into being a murderer.His and titans treatment led to the decline. Dick got ric'd. Donna became a joker thing. Roy got killed by wally. Everyone else got disbanded.superfamily is'nt a family anymore with jon being aged and supersons dead. Legions meeting with superman was hollowed out. All of these just cemented rebirth as a storyline's death. Story and direction matters. Superman nor batman represents rebirth.Wally west and his generation does. Batman can't be nightwing nor wally west. The same goes for superman.Those two have never been sidekicks.