10 Worst Superhero Movies According To Rotten Tomatoes

Imagined as a big budget spinoff to Christopher Reeve's Superman movies, there's no reason Supergirl shouldn't have been a hit. Helen Slater was great as the title character (earning herself a Saturn Award nomination for "Best Actress"), and it took nowhere near as many liberties with the source material as some of the other movies you'll find here.

With a lowly 9% score - yes, we're already in the single digits - Supergirl's Critics Consensus says, "The effects are cheesy and Supergirl's wide-eyed, cheery heroine simply isn't interesting to watch for an hour and a half."

Therein lied the problem with this movie. Supergirl just wasn't a well-written, interesting character, and it veered too far from the tone of those early Superman adventures starring Christopher Reeve. For whatever reason, the decision to embrace a lighter, sillier tone was made, likely because studio execs at the time believed female audience members wouldn't respond to anything too "complex."

The Supergirl TV series is getting close to wrapping up, but the Girl of Steel has yet to return to the big screen, proof that the damage this movie did has been hard to recover from.