If it’s not superhero franchise movies, it is another form of franchise movies dominating Hollywood in the 2000’s and beyond. Harry Potter, Twilight, Hunger Games, Star Wars, Transformers, LOTR/Hobbit, Disney animated remakes, etc.
You gave a great example with True Lies. Paramount had some big time success in the 1990’s with several one-off movies: Forrest Gump, Braveheart, and Titanic. Big success at the box office, big success at the Oscars. It’s sad how everything has played out in more recent years.