When Finding Nemo came out, people loved the character Dory so much that Pixar made a sequel: Finding Dory.
When Despicable Me came out, people loved the minions so much that Universal Pictures made Minions.
Madagascar –> Penguins of Madagascar. Toy Story –> Toy Story 2 –> Toy Story 3.
I’ve never been to Hollywood, but I imagine there’s enormous pressure to produce profitable movies. An easy way to guarantee your movie will be profitable is to create sequels of the movies people already love. Everyone wins.
Except everyone doesn’t win, not in the long run. Sequels, while they tend to entertain and produce profit in the short-term, fail to do much more than that. Sequels almost always fail to change the culture.
Shawshank Redemption (1994), The Godfather (1972), and Casa Blanca (1942) are still being watched, talked about, and changing our culture for the better.
Incredibles 2 will be forgotten in a few months.