BEIJING, Aug. 6 (Xinhuanet) -- Now that "The Dark Knight" has soared beyond the 4 million U.S. dollar box-office mark, Batman fans are wondering who will be the Caped Crusader's next foe.

    iVillage is reporting the next arch villain may well be the Riddler in "Batman 3." According to the rumor mill, Johnny Depp might sign on to play the nefarious super-criminal.

    Slashfilm notes that there are additional possibilities floating around. For instance, Phillip Seymour Hoffman may play the Penguin or Angelina Jolie could don Catwoman's skin-tight suit. Truth or fiction, fanboys around the world must be having a heart attack at the mere thought.

    Still, the "official" rumor mill is just one of the ways superfans are checking in on the next Batman flick. Many seek the scoop themselves as evidenced by impressive searches on "batman 3 rumors," "dark knight sequel casting rumors," and "batman's next villain."

    (Agencies)