After suffering a ten-year downturn in the 1990s, the Lego Group went forward with the idea of storytelling, believing a theme with a storyline behind it would appeal to their audience. Their first attempt was the Star Wars line based on the film series of the same name. Despite becoming an instant success upon its 1999 release, the royalty payments to the franchise owners Lucasfilm limited Lego's profit, prompting the latter to decide that an original story would be more advantageous to them. Their first attempts were the Slizer/Throwbots and RoboRiders themes released in 1999 and 2000, respectively, under the Lego Group's already-established Technic construction series. Technic construction elements, such as the then-innovative 'ball-and-socket' system used to create free joint movement, were heavily incorporated into the sets and would go on to be used and greatly expanded upon in Bionicle.