Sets in the theme are based on the twelfth season of Ninjago, subtitled Prime Empire. Prime Empire, called Unfinished Adventure Game, is a legendary arcade game programmed and tested 30 years ago. The ninja entered Prime Empire to rescue the people who were captured inside the video game. The Key-Tanas are the collectible items within the sets, and most of the sets are based on the ninja's new vehicles from this season. Arcade Pods were also introduced.
2020 LEGO Sets
In 2020, LEGO thrived despite global disruptions, debuting several new lines for both families and adult fans. LEGO Super Mario introduced interactive, course-building play; Monkie Kid launched with a modern take on Journey to the West; and creative-focused ranges such as DOTS, LEGO Art, and Brick Sketches broadened display and craft appeal. Creator Expert (later Icons) and Ideas delivered standout display sets, anchoring a strong year for collectors.