Scarlett's wealth advantage stems largely from her Black Widow saga and MCU integration, which began with Iron Man 2 (2010) and snowballed into a $1B+ franchise role. Marvel stars command premium backend deals—profit participation, merchandising cuts, and sequel bonuses that compound over a decade. Margot entered Hollywood later (2008 vs. Scarlett's 1994) and, despite The Wolf of Wall Street (2013) and Barbie's cultural dominance, built wealth through production deals rather than billion-dollar franchise anchoring.

Timing matters brutally in Hollywood. Scarlett capitalized on superhero mania's birth, landing early MCU equity before streaming fragmented audiences. Her theatrical releases consistently grossed $600M+ globally, whereas Margot's filmography, while critically lauded, often underperformed at box offices outside Barbie's 2023 phenomenon. A single Black Widow film ($379M) or Avengers team-up ($2B+) generates more merchandising and international revenue than Margot's entire oeuvre pre-2023.

Production equity tilts differently too. Margot's LuckyChap Entertainment (co-owned with husband Tom Ackerley) produces film and TV with modest returns, while Scarlett's selective venture approach yields fewer but higher-stakes projects. However, Margot's Barbie profit-sharing likely narrows this gap significantly—conservative estimates suggest $10-30M additional earnings. By 2025, the gap may tighten to $2-3x, but Scarlett's decade-long MCU compounding still creates structural wealth separation.