Jaws, Kong, Spiderman, Superman the ride, all would like a word with you
Disney created an environment that was unique - but ultimately the idea of 'themed entertainment' (and not just rides) was copied in the 90s onward and surpasses Disney in many examples. Disney leans on their successful franchises to be part of their draw, and not just 'come see the world's most unique theme park ride system!'.
Guests remember the experience... and revisit based on their enjoyment... but their initial draw is the themes and reputation.
The center of mass of the market isn't moved by 'wanting to see the latest trackless vehicles' -- it's moved by wanting to visit a place like Carsland... or Hogwarts.