From Subtle Easter Eggs to Connected Universes: Cinema's Narrative Evolution

[Savannah.W]

I'm creating a video essay about the evolution of cinematic Easter eggs, from subtle background details to the interconnected universe model popularized by Marvel. I'm particularly interested in how these hidden elements function beyond mere fan service, potentially enriching world-building or offering thematic commentary. For fellow film analysts, what are some of the most clever or narratively significant Easter eggs you've encountered, and how do you think their purpose has changed with the rise of social media and instant online dissection?