Modern movies (and TV for that matter) have become so commercialized and expensive that the series they are now rehashing (Star Wars for instance) wouldn't be possible to create today. George Lucas definitely didn't have the name or history necessary when Alan Ladd gave the go ahead to make Star Wars that you would need these days for a comparably ambitious film.
It's weird because I feel like some other forms of media, namely games and music have gone in the opposite direction because of the availability and power of tools for independent production. However movies just need so much more resources the same indie competition hasn't been able to come in and shake things up sadly.