You can't. Because first they don't have monopoly on anything. Making the argument that only Disney can make Star Wars would be like arguing that only Tom Hanks

You can't. Because first they don't have monopoly on anything. Making the argument that only Disney can make Star Wars would be like arguing that only Tom Hanks can be Tom Hanks. Second, even if you could prove they are a monopoly 'to big' you would still need to prove that there is actual harm to consumers. If the Disney streaming service is reasonably priced its not clear how you would prove that. What would really make far more sense is simply to reduce Copyright laws back to former levels so that things get to be public domain.