Automobilwoche [sub] has it on good authority (Mini chief Wolfgang Armbrecht) that BMW plans a minier than Mini car. They want to show a prototype at the Detroit Auto Show next year. They probably can bring it as carry-on.
Armbrecht calls it “the next spectacular idea out of the house of Mini” (Legoland?) Not much more is known. Except that it will be much smaller than the current Mini. So what will it be called? Maybe the video will inspire you.