Originally Posted by Kevin Roegele
Yes, Batman's origin has been told plenty of times over seventy years. This is the first time anyone has felt the need to explain the Batmobile.
The majority of people who have seen Batman Begins would have not read the comics before. Also explaining the origin of the Batmobile and the suit was to show that Wayne Enterprises were dabbling in some pretty heavy Military technology. Which also explains the Microwave Emitter belonging to Wayne Enterprises.