The removal of Superman: Tower of Power from Six Flags St. Louis was primarily influenced by safety concerns and a major accident involving a similar ride model within the Six Flags chain. On June 21, 2007, a tragic incident occurred at Six Flags Kentucky Kingdom on their version of the Superman tower when a snapped cable severed the feet of a 13-year-old girl. Following this event, Six Flags temporarily shut down all Intamin-built drop towers across their parks for rigorous inspections. While the St. Louis tower was eventually cleared to reopen, the ride's reputation suffered, and maintenance costs for the aging hydraulic and cable systems began to climb. The ride sat dormant for several seasons before being officially removed from the park's website in 2021. It was ultimately replaced by Catwoman Whip, a modern Zamperla Endeavour attraction. The decision to retire Superman was a strategic move to refresh the park's thrill lineup with more reliable, higher-capacity hardware that didn't carry the stigma of the 2007 accident.