Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
Play as Joker and Harley Quinn, setting up a variety of celebration set pieces. Be the Dark Knight and play as some of the most iconic faces of Batman through the years, including his first appearance in Detective Comics 27.