I don't think you can replaces great themes. But I think people do want to hear fresh arrangements of them. They don't want to hear them played the same way all the time.
“We were astonished by the beauty and refinement of the art displayed by the objects surpassing all we could have imagined - the impression was overwhelming.”
“Ideally if I settled down with a wife I would love to form my own troupe of mini dancers!”