See https://fairuse.stanford.edu/case/klinger-v-conan-doyle-estate-ltd/ https://fairuse.stanford.edu/case/klinger-v-conan-doyle-esta... I would expect drawings

See https://fairuse.stanford.edu/case/klinger-v-conan-doyle-estate-ltd/ https://fairuse.stanford.edu/case/klinger-v-conan-doyle-esta... I would expect drawings based solely on thr Steamboat Willy work to be okay. The sequels start new timers on new characters or qualities, they don't extend the copyright on the original work. of course, IANAL.