Star Wars was successful in this aspect because of the light-saber, and Darth Vader costumes- both of which are unmistakably recognizable. However, putting merchandise on the market is not a matter of just creating a unique product. There is an entire process that goes into the selling of merchandise. As A matter of fact, the studio that produced the movie does not have that much involvement in what the final product put on the market is. All they have to do, is have enough money to get companies to produce merchandise for them.
According to (Lubbers, Charles A. and William J. Adams), the first step is to get in contact with organizations that would be interested in creating and selling a product. If the studio wanted toys made, then they