Before I start this is no way intended to be a sequel to the Dark Knight, it's just random ideas on how they could do more movies, not excluding a sequel of course.
First, Batman.
I'm sticking with Christian Bale. I don't really like him much, and his Batman is par at best. But, his Bruce Wayne is awesome and for once I'd love to see a trilogy with the same actor in all three.
Catwoman.
Catwoman is a hard one for me. I've read many suggestion on this site, and I've never really cared much for any of them. But, I've never found anyone I like better. Catwoman needs to be portrayed as sleek, sexy, intuitive, cunning, devious and very very agile. Now, there's not a doubt in my mind that any of these women could do this. But since I can't decide myself. I'm going to post them all, and you can choose your favorite.
Penguin.
Now, the Penguin is one of my favorite Batman characters. Which, is why I'm casting him, lol. Now in order for the Penguin to fit into the new Nolan style Bat verse. They would almost have to use the current character for the comics. The club owner/criminal. The actor would have to be able to play a cold, sniveling little shit. Who acts real tough until Bats shows up and scares the piss outta him.
Now, if you've ever seen Eragon you know why I chose him. He's a very good actor. He's good at playing Evil, and honestly has the facial recognition that it wouldn't take but a little work to make him look the role. I'll show you what I mean.
Riddler.
Another one of my favorites. In order for Riddler to fit into the Nolan world of Batman. I think a mix of these three characters would be perfect.
The Riddler has to be smarter than everyone, aside from Bats of course. He has to quick witted, funny(but only to himself) completely annoying, but drop dead serious quicker than you can blink. Know What I mean? That's why I chose Matthew Gray Gubler.
If you've ever watched Criminal Minds, you'll know why. He plays a detective. He's good at figuring out clues. He's extremely smart, and quick, and he's just the right build for the part
Robin.
Now there's a few different ways this could be done. They could start with his origin and hire a 14-15 year old actor. Or bring him in a few years later. Maybe as a co-op, for school, at Wayne Tech. (Don't like the idea, just shooting em out) they could also have him training in the first become Robin at the end, and than skip a few years for the next movie and make him Nightwing. Honestly, the choices are endless. Here's who I think should play the characters.
Everyone knows Milo from Heroes. I think he'd be perfect for the role of Nightwing, hands down, the best choice ever. He looks the part, he's in great physical shape, and his character on Heroes, is extremely similar so we all know he could do it.
Now, if you have seen 3:10 to Yuma the younger of the two above plays the youngest son. It's not a very big role, but he does good. He's a few years older than that now, roughly 13-14. I think he would do a hella good job. I couldn't find a picture of him the age he is now. They have one on IMDB but I can't copy it. The older, you have probably seen before. He played Olig, in Paul Walker's running scared. I find him to be a phenomenal young actor. He's also in the second, third, and possibly fourth twilight movies. I think he would do the character justice, if they decided to go with an older actor for the part. He's roughly 17-18 years old.
Well, that about sums it up for me. I hope I did a good job. I've read a lot of complaints lately. I tried really hard. Sorry about the size of the pictures. I haven't quite mastered that yet. Getting there tho.