Regardless, the human generating and publishing these images is obviously responsible to ensure they are not violating any IP property. So they might get sued by Disney. I don't get why the AI companies would be effected in any way. Disney is not suing Blender if I render an image of Mickey Mouse with it.
Though I am sure that artists might find an likely ally in Disney against the "AI"'s when they tell them about their idea of making art-styles copyright-able Being able to monopolize art styles would be indeed a dream come true for those huge corporations.
<https://waxy.org/2019/12/how-artists-on-twitter-tricked-spam...>
If art streams are tree-spiked with copyrighted or trademarked works, then AI generators might be a bit more gun-shy about training with abandon on such threads.
It's a form of monkeywrenching.
<https://en.wikipedia.org/wiki/Tree_spiking>
<https://en.wikipedia.org/wiki/Sabotage#As_environmental_acti...>