are there really any other big name, big budget dinosaur movies

Heck, there are almost no more big name, big budget movies that aren't already existing IP.

For a depressing read, scroll through box office mojo top movies for the last dozen years. It's almost all remakes, sequels etc.

So for a studio, why bother trying to make something new when people will watch the latest Jurrasic money making slop no matter what?