Looks like people are taking offense to me saying that all hollywood movies are the same. If you can watch the same superhero movie 30 times (with different skins and superhero names), power to you. I can't any more.
Books are someone's fanfic that someone else liked enough to publish. Scripts are similar.
Most stories are written around the same small groups:
- Single protagonist
- Duo or buddies
- 3 person team (heavy hitter, smart/tech/engineer, leader)
- 5 person team (usually a 3 person team core with 2 additional members)
It's like "madlibbing" a story - using characters named "heavy", "tech", "leader", any IP can slot in their characters. For these, Teal'c/Carter/O'Neill or Raphael/Donatello/Leonardo or Hulk/Stark/Rogers.
Some plots will naturally be more widely adaptable to multiple IPs than others. Any hero can be used to tell a sufficiently generic story, but not all heroes work in all stories. Imagine doing Man of Steel in the MCU, or Infinity War in the DCEU.
This is supposed to be a bland analysis. Please, try to be more objective.
These roles are well-defined in modern literature, and it logically follows that a market must exist, to buy and sell stories and IPs. This allows a video production company to license plots and characters, combine them (insert hero A into slot Tech), and sell edited videos of the production.