Once again Warner Bros. will be offering exclusive key cards at nearly 40 participating hotels during San Diego Comic-Con. This year 40,000 special key cards will be produced and available in 5 different WBTV DC Heroe styles. That’s more than ever before! Key cards will feature The Flash, Arrow, Gotham, Supergirl, DC’s Legends of Tomorrow, and Time After Time. Read the original article here to get a closer look at the cards.