The LEGO Power Racers subtheme of LEGO Racers was introduced in 2005 and focused on TECHNIC and System vehicles with various functions such as pull-back motors, falling apart on impact, or slammers which propelled it forward. Power Racers was discontinued in 2010 and consisted of 35 sets in total.
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.