LEGO Ben 10 was a collaboration between LEGO and Cartoon Network in 2010 and was based on the Alien Force series. It was an unsuccessful theme commercially at the time and was discontinued in the same year, in fact, the theme is considered by some as the most unpopular LEGO theme of all time. The sets where based on the BIONICLE parts and each set is an action figure version of one of Ben's alien forms. The Ben 10 theme was revealed at about the same time that BIONICLE was being wound down and did feature an improved ball-and-socket joint.
2010 LEGO Sets
2010 sets the stage for a massive investment opportunity for future collectors with the release of the Series 1 of the Collectable Minifigures. In addition, LEGO introduced the Cars theme and LEGO Harry Potter: Years 1-4 was also released. However, a number of themes and subthemes were retired including Agents, Bob The Builder, Indiana Jones and Thomas and Friends. For the Star Wars collectors, LEGO celebrated the 30th Anniversary of The Empire Strikes Back with a number of special sets. Additionally, LEGO and Disney released a bunch of different Disney subthemes.