ducati st4 the Ventriloquist and scarface could add a really creepy inner child horror element to the mix. and hell why not just bring back batman's dark half for the next installment. man-bat would be cool but i think it would turn the franchise into a hellboy-esque believability and just get hokey. i'd like to see the joker again. then it would make sense if they put harley in the film anyway. i dont know how i feel about treading on heath ledger's legacy but maybe they can put that aside and get an actor that would honor his performance. and dont forget about Raz's al Ghul. i'd bet anything he's still around.