Years before Ryan Reynolds became Deadpool, he starred in a little superhero movie called Green Lantern. Instead of being Reynolds' breakout hit, the movie is one of the better-known flops of the genre. However, the star says it did serve a purpose, as it taught him a lot about how to make movies by doing the opposite of what Green Lantern did.

Ryan Reynolds spoke about his big takeaways from the critically-panned 2011 superhero film "Green Lantern" during a discussion at the Time100 Summit.

Green Lantern, the DC superhero film that further catapulted actor Ryan Reynolds into the limelight, may be considered a box office disappointment, but the experience taught Reynolds the most important lesson of his entrepreneurial career.