I´´ll put it this way. If a superhero could ever exist in the real world, it´d be Batman. Begins does a really good job, IMO, to show how you could get logic and emotionally believable explanations for all the major elements of the character: his motivations, his skills, his gadgets, etc. There are still significant problems, such as a police officer supporting a vigilante, which is an illegal activity, or how a single unarmed man can capture a dozen armed thugs at once, etc. The actual existence of the character would demand an incredible alignment of circumstances, such as the ones portrayed in the movie, animated series and various comics, and of course it would be an extra push to have all his villains exist as well, and in the same city, but there is enough suspension of disbelief in Batman for your inner child to believe that he COULD exist... and that he COULD be you... And that´s part of the reason why he´s such a popular character.