> if you used ai to design a new superhero and then added pink shoes, yellow hair, and a beard
Wouldn't that depend heavily on the prompt used (among other factors such as image to image and ControlNet)? You could be specifying lots of detail about the design in your prompt, and the AI could only be generating concept artwork with little variation from what you already provided.
If I'm already providing the pose, the face, and the outfit for a character (say via ControlNet and Textual Inversion), generating <my_character> should be no different from generating <superman>, that is to say, the copyright already exists thanks to my work and the AI is just a tool, the output of which should have no bearing on who owns that copyright (DC is going to be perfectly able to challenge my commercial use of AI generated superman artwork).