The Ninjago Legacy subtheme of Ninjago is dedicated to re-imagining concepts used in classic sets. The first wave consisted of re-imagined sets from Seasons 1 and 2 and released in early 2019. The second wave, released in 2020, consisted of sets from the pilot episodes and Seasons 2–4. So far there have been 5 waves, the third wave consisted of sets from Seasons 1 and 3. The fourth wave focused on sets from seasons 2–5 and the fifth wave consisted of sets from the pilot episodes and seasons 1 and 5. Rather than conform to a specific season, Legacy is based on the Ninjago franchise's early history, with the first wave celebrating the television show's tenth season and 100th episode.