They say when you set out to do something, you should know what you are intending to achieve with it. When Ridley Scott began work on Prometheus, it was as a prequel to the Alien franchise, but then the muddled announcement came out that it was only vaguely connected. But, make no mistake, this IS an Alien prequel, but the confusion over what it’s meant to be means that it fails to be anything particularly worthwhile.