User blog comment:Dadaw/what is "beta sets" ?/@comment-4835804-20140905204133

Those sets are preliminary images of sets that are mocked-up versions of the final sets. Essentially, they are unfinished prototypes. The images are usually leaked months before the official reveal from LEGO. We here at the Mixels Wiki don't usually allow leaks to be uploaded. However, since these sets have already been released, these images are fine to have.