What are some examples in comics where the author can't control the characters after painting?

There are many examples in comics where the author can't control the characters after painting. Here are some common examples:

Dragon Ball: This cartoon was originally created by Toriyama Akira. Later, he participated in animation production. Because the animation process was very happy, he announced that he would not make a sequel after the animation was completed. However, he later created Dragon Ball Super and Dragon Ball Hero, but the quality and reputation of these works are not as good as the original. Some of these characters, such as Charouk and Artificial Man, have lost their original charm and control.

Saint saint seiya Saint: Masami Kurumada's later works were also out of control. For example, Sagar, a Gemini, became very powerful in the later period, and even controlled other Gold Saints's thoughts, which was difficult for Masami Kurumada to control.

One Piece: Eiichiro Oda introduced many new characters and plots in this work, but these new elements were not well integrated with the original story, which made the whole story very confusing and difficult to control.

Detective Conan: G?sh? Aoyama introduced many new characters and plots in this work, but these new elements were not well integrated with the original story, which made the whole story very confusing and difficult to control.

In short, in the process of creating cartoons, the author sometimes can't control the development of characters for various reasons, which may be caused by the complicated story, too many characters and the author's own lack of ability.