A Team Of superheroines decides that they need a little bit of team identity so they decide that their vastly differing castumes should have some form of insgnia that will bring them together. After a lot of discussion they still cannot come to a decision about what the design should be.
One of the team suggests having a public competition with the winning design picked by an independant team of judges. There are hundreds of entries and the judges choose a winner. One of the judges happens to be a busines man who offers to manufacture the badges for them.
Of course he has an ulterior motive. When finished and integrated into the costumes he will be able to activate them en masse and using some clever technology instantly enslave every heroine in the team.
Opportunities here for mass stiff armed zombie walks as the heroines answer the call from all over the city from whatever they are doing. Blank eyes and glowing team badges as they cross the city oblivious to their fate.