Recently I had to the opportunity to view a scene from The Dark Knight, but without the audio track, i wont say where security is very tight where i work, but it did hold some interesting spoiler material in regards to the Batmobile/bat-pod.
do not read if you dont want to get spoiled.
The sequences that they was being worked on at that time was the batmobile to bat-pod tranformation.
I dont know if this is old new or what.
Many believe that the batman builds the bat-pod from the wreakage of the batmobile, this is in fact untrue, the bat-pod is born though a much more dramatic event.
Heres what I saw, a high speed chase, involving the joker and he is chasing a heavily swat protected Harvey Dent through the streets of gotham, with intentions to kill him, the batman is chasing down the joker (to prevent the killing) in the batmobile (tumbler).
The joker launches a rocket (al la the 1st trailer) at the vehicle that contains Harvey Dent, the batman manages to jump the batmobile (as we learnt from the first film the tumbler can indeed jump) into the incoming missile and it takes the full force of the explosion. Leaving the batmobile heavily damaged and unable to operated, taking batman out of the chase, quick cut to the batman he flicks a couple of switches in the batmobile, panels start to drop and within the batmobile the bat-pod emerges and accelerates out of the damaged batmobile, basically the bat-pod is almost like a emergency escape vehicle.
The batman is now back in the chase between the joker and Harvey dent, but to catch up he has have to use drastic measures, like blowing up stationary cars that are in his way, taking short cuts through back allies,
there is also time for a comedic moment, two kids are playing "cops & robbers" or something, it was hard to tell since there was no audio, basically they are pretending to shoot guns, using there fingers, anyway one of the kids points his finger at a car and pretends to shot it, it blows up, the kid looks at his finger, the bat-pod blasts past them.
Anyway I hope this helps answer some questions. I Apologise for the spelling errors, Im kinda pushed for time at the moment.
You can do whatever you like with this information. call it false call it true, i know it to be true cos i've seen it.
Peace
TheQuietKnight.