Well Christopher Nolan has confirmed a nonconfirmation of a noncommitment to a commitment.
Yep, The Dark Knight Rises will not feature the Riddler.
Photo from Wikipedia
I think getting into the psyche of Bruce Wayne’s head and the addition of a genius criminal who has worked alongside the Scarecrow allows us to really get into the last layers of the onion. As someone who figures out Batman’s secret identity in the comic, you can have confrontations between all of Bruce’s worlds culminating into the end of this trilogy where Batman/Bruce Wayne establishes the boundaries between his personal, public, and vigilante life and the tragedies he faces when each one overlaps another sector. Kind of puts the question of “why do it” to the test.
That’s my 2 cents. But Killer Moth would be cool too.