What is something so commonly known that we don't consider it a spoiler anymore?

1. Dr Jekyll* and Mr Hyde aren't revealed to be the same person until the last page.
   — Dodger944


2. Romeo and Juliet both die at the end. The Titanic sinks.
   — ExpFilm_Student


3. No way I'm reading this thread two hours before going to see Star Wars.
   — ZarquonsFlatTire






4. George shoots lennie
   — _blue_cow_


5. The ugly duckling is actually a swan!
   — formlesswendigo


6. Soylent green = people
   — WeWerePromisedMuse






7. Redrum being read backwards
   — kristen1988


8. "I am your father"
   — WAUWt3r


9. batman merely adopted the dark
   — Illiterate_BookClub






10. Jesus dies at the end
    — theBatMatt


11. What planet the planet of the apes is.
    — thesuddendonut


12. Rosebud.
    — BelatedGamer