I LOVE IT! Would be nice if the bonet had more to it but other that, it's great! He's supposed to be using a modified military vehicle anyway and the fact that Wayne is just starting out his venture as the Dark Knight it wouldn't make sense for him to have the uber-cool Batmobile from the original Batman film.
I'm guessing when we see this car rolling it's gonna be an unstoppable bad ass.
A few weeks back this popped up online
http://www.aintitcool.com/display.cgi?id=17218 it's been debunked but I still like the 'official' design more. You never know, it may just be a prototype.