Most experts exclude SDCC exclusives from "Complete" lists. Stick to retail releases to keep your sanity.
A sad truth about a true collection is the existence of promotional items that cost more than a used car.
Emotionally? Ninjago is unique because it ages with its audience. A complete collection isn't just plastic; it is a physical timeline of Cole’s legs going from short to long, Lloyd growing from a child to the Green Ninja, and the evolution from simple four-stud shooter bricks to complex Technic dragons.