SISTAR has been getting fans excited for their upcoming comeback with some clever and mysterious teaser pics. On June 22, the band will be dropping their third mini-album as well as performing their new song for the first time at a comeback showcase.

On June 9, SISTAR added to the suspense by each posting an enticing silhouette photo on their personal Instagrams. Each member added the caption “WHO AM I?” along with the name of their band and a hashtag that possibly describes the character they’re playing in this concept.

Starting from top left and going clockwise, Dasom‘s photo is captioned “birdofprey,” Soyu‘s reads “thequeenofgreen,” Hyorin‘s says “ninelives,” and Bora‘s is “joker.”

Some fans have been speculating that the concept might be related to “Batman,” with the girls possibly playing the characters of Batgirl, Poison Ivy, Catwoman, and Harley Quinn.

What do you think of what we’ve seen so far of their comeback concept?