In the TV Show "Ninjago", Echo Zane was originally going to be the identity of the villain "Mr.E" because of being reprogrammed for evil by the Quiet one (Harumi) , the reason why the idea got scrapped was because of most characters in-universe not remembering the events of the season he appeared in. Source: https://www.youtube.com/watch?v=xUicGIUli0Y https://villains.fandom.com/wiki/Mr._E_(Ninjago)https://villains.fandom.com/wiki/Mr._E_(Ninjago)
