20. Batman & Robin (IMDb: 3.8)

Batman and Robin face Mr. Freeze, who wants to freeze Gotham to save his wife, while Poison Ivy schemes with plant powers and a steroid-enhanced Bane, in a colorful but campy battle full of gadgets and one-liners.
The film is lambasted for its toyetic excess, neon aesthetics, bat-nipples, endless puns, and Schumacher’s over-the-top direction. Acting is hammy, script prioritizes spectacle over story, and it killed the franchise for years. Effects are dated, tone is silly rather than dark, and it’s blamed for superhero fatigue pre-Nolan. Cult status comes from sheer awfulness, perfect for bad-movie nights.