Your friends can have their own Batman theme party or you can go to a cosplay or comic book convention where all the super fans love to dress up as their favorite character. On Halloween night, venture incognito, disguising your true identity from the world with Harley’s red and black headpiece along with a black eye mask so you can get into your character. The Aug. 22 event covered the whole DC world, from comic books to movies to TV shows to video games, fat thor costume and the Sept.