10 Movies That Massively Over-Performed At The Box Office

10. Deadpool

Deadpool spent so long in development hell that for a long time it seemed as though the movie would never get made. Ryan Reynolds had been attached to the project in some capacity since February 2004, and it would be a full twelve years before the R-rated superhero flick finally made it to cinemas. When it did, Deadpool's box office performance blew even the most optimistic predictions out of the water.

A violent, profanity-laced, fourth wall-breaking comic book movie was seen by many as a risky venture, and as a result Fox gave the production a modest $58m budget. However, a combination of social media hype and a brilliant marketing campaign saw Deadpool smash box office records when it hit theaters, opening to $132.4m domestically on its way to a global tally of $783.1m.

In the process, Tim Miller's feature debut set the highest February opening weekend ever and became the highest-grossing R-rated movie of all time as well as the biggest earner in the entire X-Men franchise to date. Deadpool was so successful that the executives at 20th Century Fox must have been wondering why it took them over a decade to finally greenlight the thing.