Companies that can leverage this new wave of AI will have, in reality, 1000x the advantage that you believe Disney has.
There's this little thing called brand value. Disney has one of the most valuable brands in the world. Forbes estimated it at being worth about $60 billion as I recall.
That brand was built heavily over many decades on IP that dates back to the 1920s, such as the most recognizable Disney character, Mickey Mouse. They manipulated the law to enhance the value of that IP and thereby gained an edge over their competitors. That's a big part of why they now enjoy such a dominant position.
None of this is especially controversial (you will get a very different spin from Disney of course).
If you want to comment about how business works you should read history and learn how business works first. AI luminary that you are, if you choose to remain ignorant then I guess this whole cycle will happen again with AI.
There is a massive amount of amazing stories based on ancient myths because it's one of the few large corpora that isn't copywritten. Once you see it in media you can't unsee it. The only space where that kind of creativity can thrive anymore is fan-fiction which lives in weird limbo where it's illegal but the copyright owners don't care. And when you want to bring any of it to the mainstream you have to hide it, all of Ali Hazelwoods books are reworked fanfics because she can't use the actual characters that inspired her -- her most famous book "The Love Hypothesis" is a Reylo fic.
Go check out https://archiveofourown.org/media and see how many works are owned by a few large corporations.