Ever wonder why the plot lines and even trailers of today's action movies often seem indistinguishable? Well, the truth is that they are intentionally made to be indistinguishable.Slate writer Peter Suderman reveals that the late author Blake Snyder's book Save the Cat! was designed to give aspiring screenwriters some tips about producing scripts with commercial appeal. However, the self-help scenario worked too well. The book has been used as a formula by studio executives to commission big budget action movies that never stray far from some basic plot devices. It's as generic as you can get, with only the characters distinguishing one story from another. The article explains why Hollywood is so devoid of creativity: if one Iron Man movie makes a ton of money, just make ten more movies just like it. The strategy works theoretically, but not always financially. Audiences often know they are being served warmed over, recycled fare and this often results in such "sure-fire" hits bombing at the box-office. Click here to read