"Inception" Cast compete for Role in "Batman 3"

The success of every Christopher Nolan's film make a lot of actors / actresses want any role whatever it is as long they can play in his film. Nolan is currently preparing a new success in the third Batman movie. Reportedly, three of Inception star now compete each others for a role in that superhero movie.
Based some source from Warner Bros, Leonardo DiCaprio, Joseph Gordon-Levitt and Tom Hardy considered for the role of Riddler character.

With the success of Inception movie and Nolan's insistence, surely one of the three actors will get the role. According to actor who play in the third Batman movie, Michael Caine (plays as the father in the Inception Cobb) - the making of the film will begin on April 11, 2011.