"Stacker is honoring the occasions in which big-budget vehicles fail to deliver the goods—ranking the biggest box office bombs of all time. Using The Numbers as a data source, rankings were compiled based on worldwide box office earnings only, and do not incorporate video or other retail sales. Also note that only the first 1,000 movies with the highest reported budgets were considered for this story, and numbers have been adjusted for inflation.
Sometimes it's easy to pinpoint where it all went wrong. Perhaps the storyline was difficult to follow or there were unexpected bumps that required a major change such as bringing in a new director or having to recast the lead. Even a top-notch director and a stellar cast aren't always enough to prevent disaster at the box office."
List source: https://stacker.com/stories/1545/biggest-box-office-bombs-all-time