I don't like Disney's strong arming tactics but that's still not an monopoly or even start of one. Disney controls a large portion of the American Blockbuster market but that's it you're negating midlevel films, the indie market, and the whole international Market every developed nation on Earth has it's own film industry. The logic that Disney is a monopoly for releasing most American Blockbuster is the same as saying Blumhouse Productions is a monopoly for currently putting out most American Horror Films.