9. Madonna As Harley Quinn
Batman Triumphant has to go down as the biggest dodged bullet in the history in cinema. Somehow impressed with the Batman & Robin dailies, a clearly drunk Warner Bros decided to give the go-ahead to a follow-up to once again be helmed by day-glo Bat-spoiler Joel Schumacher, and the director clearly took it as an opportunity to manifest his descent into madness in a handy visual aid. Madonna wasn't the worst idea of the entire thing (that comes later), but she would have been awful. Yes, she had just made Evita in 1996 and wowed a lot of people, but that was a far safer option, and the opportunity to play the cookie unhinged harlequin girl would have lead to a stinker of Swept Away proportions. You see, Madonna can't act. To be fair, the idea of Madonna cast in anything these days is enough to send the icey fingers of fear creeping up the spine. Especially now that she has that wirey last chicken in the supermarket look about her.