20 Failed Movie Plans That'll Ruin Your Day

9. William Friedkin's UFO Thriller

In 1973, shortly after taking home a slew of Academy Awards for the seminal neo-noir thriller The French Connection, William Friedkin offered audiences one of the greatest horror movies of all time in The Exorcist. 

The Exorcist proved to be a major success - if a mightily controversial one - and cemented Friedkin's place as a moviemaking powerhouse. It's a wonder, then, why his next film, a proposed sci-fi thriller called The Devil's Triangle, never got the go-ahead. 

Though details regarding the film are mostly unknown, it is known that the film would have united the star power of Marlon Brando, Steve McQueen, and Charlton Heston, and taken inspiration from the tantalising mystery of the Bermuda Triangle. 

Unfortunately, production on his next film, Sorcerer, took centre stage in Friedkin's life, and after it bombed both critically and commercially, the director abandoned the project entirely. With that filmmaker, that cast, and that promise, though, who knows what kind of gem we were deprived of.