The seven characters, via WB's FAQ, are Batman, Batgirl, Catwoman, Commissioner Gordon, Nightwing, Robin, and Talia al Ghul. "Each character is equipped with unique skills, combos, and gadgets", the FAQ says, "like Batman's Batclaw, Jim Gordon's foam sprayer, Robin's line launcher, and Catwoman's whip." Ah, yes. Jim Gordon's iconic foam sprayer.