The Ultimate Collector's Series, or UCS, is a LEGO subtheme of Star Wars introduced in 2000 and was meant to be more detailed and aimed at older builders. These Ultimate Collector's Series sets tend to be larger, and more expensive than typical sets.
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.