I've read many articles by fellow CBMer's regarding what they'd like to see in the upcoming Batman sequel. Some of you have brought up very interesting possibilities. I thought I'd throw in my two cents.
1. The Tumbler is fine. No need to have a vehicle that looks more like the old batmobiles. I feel that would take away from the essence of the first two movies and the more realistic world that Nolan is trying to convey.
2. NO BATWING. At least, not a traditional Batwing. Gotham is too small of an area to do an aerial fight scene. My thought is that in place of a full size aircraft, Batman has one or two Wayne Enterprises commissioned destroyer drones that can be controlled remotely by Batman or one of his allies.
3. Arkham Asylum. This must be in the movie...early. My thought was that the movie opens with Batman capturing Scarecrow and leaving him for the police. They transport him to the new Arkham Asylum on the outskirts of Gotham, where as he is walked down the corridor by the police and Dr. Harleen Quinnzel, you see into some of the cells. The cells could have the giant glass windows, much like Silence of the Lambs. In these cells, you see other Batman criminals. No costumes, but definitely recognizable.
4. I like the idea of Riddler as the main antagonist, but as a mental opponent only. Someone who's more behind the scenes. Following the same route as with the Joker, make him a normal guy, but with an obsession for crossword puzzles and brain teasers. He can be one of those people who mess around with numbers and win the lottery. I would like to see him employ Victor Zsasz, sending him on a killing spree and using his knowledge of forensic science to cover up all but the most vague of clues. Using his intellect to keep Batman turning in circles, trying to catch the killer while trying to avoid the police. Regardless of who the villain is, we need a real fight this time. Not some close quarter fight on a subway train or roof top scuffle with someone who shouldn't stand a chance.
5. Everyone keeps screaming for NO ROBIN!!! I agree. No Robin. But I would like to see Tim Drake. Not an acrobat or master of several martial arts. Just a teenager who fancies himself a detective and thinks he can crack the Batman case. Doesn't have to be a main character, maybe just a sub-plot. A lot of people keep saying this could be the last movie of the series. If Christian Bale decides not to return for another movie, maybe it can be said that he passed the torch to Tim Drake, this way we can avoid rebooting the franchise again.
6. Finally, I don't agree that Batman needs a love interest in this movie. One would think that he would still be so heart broken over Rachel Dawes that he pours himself completely into his work, as well as developing a more aggressive attitude. Maybe show him at a point beating a perp, while seeing a flashback of the Joker, and nearly killing him.
Well, those are my thoughts on the Bat sequel. I look forward to hearing your comments.