I´ve heard rumblings that Hasbro will be releasing the Minimum Transformers (AKA Worlds Smallest Transformers) as part of TF Universe in the near future. These may wind up being store exclusives. The most likely candidate is KB Toys. Whenever a really small figure needs to be sold for a laughably high price, KB Toys is right there to gouge that price. Fans would probably save money by ordering the Japanese versionsonline.
