The Captain Planet TV series of the 90s may have been a cartoon in format, but was a blockbuster in terms of its cast. The characters’ voices were provided by the likes of Whoopi Goldberg, Meg Ryan, Jeff Goldblum and Martin Sheen. Imagine that lot together in a movie version – a surefire success! A script was floating about around 2000; called Dark Planet, it was very different to the show, focusing on a post-apocolyptic Earth, presumably destroyed by mass pollution. The concept landed in development hell when it was scrapped, and now Sony Pictures are reportedly resurrecting the idea with the boys behind the Transformers films.