spoiler warning: do not read this if you haven't seen the film!!!!!

Some of the "clues" in the movie(some from memory, some from what others have said): remember, as Jackson says at the end, comic book heros/villians are opposite of each other. so:

  • Willis is unbreakable, Jackson is "Mr. Glass"
  • Willis is white, Jackson is black
  • Willis has no hair, Jackson has a fro(seems silly, but...)
  • also, if you notice that they are opposites: Willis protects people, so what would you expect Jackson to do?

also, clues that Willis/Jackson both are comic book characters:

  • Willis is seen numerous times wearing a rainjacket that looks much like a cape/costume(even going over his head)
  • Jackson wears purple a lot(possibly every scene) - like a costume
  • also, obviously there's the conversation between Willis and Jackson's mother near the end where she says that some villians fight you directly, and some fight you in your mind

I plan on watching this movie again, because I think there definitely are clues, even though they may be subtle