It showed up out of nowhere, made the most bank in history (for a movie), refused to explain and disappeared for like 15 years, then came back out of nowhere with a sequel movie, a AAA game, and like 3 more movies in the works.
Edit: I think it now has like a Lego line too?
Semi related: i once lost an internet friend because he mentioned avatar and my dumb arse thought he was talking about the movies when he was talking about the anime