In Batman lore, the police summon the hero by projecting a magnified Bat-signal across the night sky. That’s a fitting metaphor for the character’s much-debated history in movies, which has cast an unusually large shadow thanks to fans convinced, in their minds, precisely how the Dark Knight should be depicted.

(SOURCE) https://www.cnn.com/2022/03/05/entertainment/batman-history-column/index.html