[Cipher7071]

The classic remake that I remember most is "West Side Story." Many of you might not remember that one, but it was an intentional clone of "Romeo and Juliet," using two New York gangs as the feuding families. And the Star Trek episode may very well be an intentional clone of "The Enemy Below."

As far as plots go, one can, as Gandalf Parker suggests, throw a bunch of elements into a bag and draw them at random to produce a script. Odds are that every so often similar plots will result from the process.