Eddie Guerrero's $5M ceiling was fundamentally constrained by timing and longevity. His peak earning years (2004-2005) at $500K annually represent the tail end of a career that started in 1989—he never captured the merchandising boom of the 2010s when WWE's digital revenue streams exploded. More critically, his death in 2005 froze his earning potential just as he was cresting. Rey Mysterio, conversely, maintained active roster status through 2015 and beyond, capturing an additional decade of merchandise sales, licensing deals, and streaming residuals that Guerrero's estate couldn't capitalize on.

The mask is where the financial divergence becomes stark. While Eddie's legacy is primarily tied to in-ring performance and character work, Rey's mask transcended wrestling into mainstream fashion and collectible culture. That single asset—the mystique, the replicas, the licensing to toy companies and apparel makers—likely accounts for $3-5M of his net worth independently. Eddie's peak value was his drawing power; Rey's peak value became his *intellectual property*. One depends on active promotion, the other generates passive income indefinitely.

Career architecture matters too. Rey diversified earlier: film cameos (Speed Racer), acting roles, and international merchandise deals that Eddie didn't pursue at the same scale. By staying healthier and wrestling longer, Rey captured multiple revenue cycles—WCW era, WWE boom, WWE streaming era. Eddie's career was more concentrated. The posthumous merchandise bump mentioned for Eddie is real but reactive; Rey's brands are proactive, cultivated, and built into licensing agreements that continue generating 6-7 figures annually.