Reduce, reuse, recycle. We might think of this as a new concept, but old Hollywood was a big fan. Movies are very expensive, after all, and for a long time, people who made them weren't always sure what they were doing. Movies hadn't been around that long, so they were kinda flying by the seat of their pants, and sometimes they flew right into a cliff.
Such was the case with 1931's unfinished Creation. It had some interesting ideas, but it was incredibly boring, at least according to the studio. It was a story of people going to an island populated by dinosaurs, and then terror ensued. While that sounds fun, it was apparently embarrassingly bad. But there were lots of good creatures and sets created for it, so why not reuse them? Out of the scraps of Creation, 1933's King Kong was born.