If you think Hollywood (or the game industry, for that matter) isn't creative, check out the folks working China's dream factory.
Many of the posters are straight up copies, while some of them *could* be kwinky-dinks, such as the Hero and the DOA: Dead or Alive posters.
One of the most interesting things about Chinese knock-offs is how people online in China are becoming increasingly quick to point out copyright transgressions of their fellow countrymen.
Click the links below for more info on the flicks.
Update: Clarified the section about Hero and DOA.