Frankly I'd like to see an older Batman with his complete supporting cast for the next films. Distance them enough to make them
seem like they continued the Nolan franchise, but make enough changes to make them stand on their own (like
X-Men First Class).
Eric Dane - Bruce Wayne/ Batman
Ian Somhalder - Nightwing (Dick Grayson) - Jump right in to this character I say. Give a little backstory in dialogue about him being the first Robin.
Timothy Dalton - Alfred Pennyworth - I'm really drawing inspiration from the Jim Lee era Batman comics. I think that kind of gritty but solid action flick is the perfect follow up, because it can be comic bookish while retaining some of the dark elements from the Nolanverse.
Robin (Tim Drake) - Logan Lerman - Yup, who else. You guessed it.
Joker - Crispin Glover - This time NO ORIGIN WHATSOEVER. He's just there, like he's supposed to be there
James Gordon - Bryan Cranston. And he'll just be there too, I wouldn't even bother casting Bruce's Parents for this one
Red Hood (Jason Todd) - Jensen Ackles - Yes, the voice actor no less. He proved it though and I think
Under the Red Hood is an interesting basis for a Batman film. I suspect TDKR is introducing the Lazarus Pit, heck that seems confirmed, so it would be a way to tie the new movies to the old ones without necessarily being a part of them.
Riddler - Neal Patrick Harris - I'd love to throw an additional villain in there to chew the scenarie a bit. Maybe just be used as a somewhat plot device in Arkham. I think this would be great.
Killer Croc - Kevin Grevioux - I wanted a villain in the beginning, a la Amazo in
Under the Red Hood, but I wanted someone who was a Batman villain, not a Justice League villain. I wanted this villain to show that not all Batman villains are "dudes in suits", that some of them are quite monsterous and have super powers of sorts.