Batman 3....

[Dr. Briggs]

Nolan considers the Penguin difficult to portray on film, explaining, "There are certain characters that are easier to mesh with the more real take on Batman we're doing. The Penguin would be tricky."[93]

in 2009, Michael Caine had told MTV News that the film was not being worked on and Johnny Depp had not been offered any role.[102] It was rumored that Joseph Gordon-Levitt was in talks to play the Riddler,[103] however Gordon-Levitt's representatives have denied his involvement.[104]

Make him a mobster, make him a bird enthusiast, give him a knife hidden in an umbrella

Johnny Depp would be too cliche; Gordon Levitt looks like he'd actually be a good Riddler though!