A union representing workers in the creative industries says there is "real concern" among its members about a $1bn (£740m) deal which will see Disney characters brought to ChatGPT and video-generation tool Sora.
It is the first major studio to license parts of its catalogue to OpenAI, which makes the tools.
Fans will be able to generate and share pictures and videos of more than 200 characters from Disney's franchises, including Pixar, Marvel and Star Wars.
"Everyone in the entertainment industry, especially all the creative talent, are incredibly worried about what the implications are," said Sag-Aftra executive director Duncan Crabtree-Ireland.
