Wealthy people with desires to become Batman can more-or-less do so.
First they sign a waiver and an NDA, removing any liability from the Bruce Wayne Gap Year company. Then they'll pay the company tens of thousands of dollars to pay for what is to come.
They'll be put into a real criminal gang [1], and taken around the world getting involved in all sorts of illegal [2] activities.
Sooner or later they'll be subtly led to the Himalayas, where they'll join a monastery, lead a simple life of celibacy and minimalism and slowly learn to meditate and fully understand themselves and their body.
After a while, they'll be groomed by a man [3] claiming to be working for a mysterious and powerful leader of a guild of assassins, and taught all kinds of martial arts over months and months, culminating in a complex battle which determines their eligibility. At that point, they will be asked to do something their morals will not allow (this will be determined in a psychological screening), and end up betraying and destroying [4] the guild.
Then they return home, better for the experience.
It can't fail. A friend of mine also suggested it be re-implemented for all sorts of action hero/film type situations. James Bond, Die Hard, Rambo, etc. It's essentially a very expensive, realistic roleplaying experience.
[1]: Actually, very highly paid and well-trained actors. We don't tell them that though.
[2]: Mostly not illegal, but they're made to believe that these things are illegal. Some things will be borderline (they may accidentally end up threatening people who are not part of the ruse, for example), hence the NDA.
[3]: Also an actor. A very good, very well paid actor. Possibly we'll just get Liam Neeson, and he'll act so well that he'll convince them that he's not Liam Neeson.
[4]: Not really. The martial artists will never be allowed to be worse than the client, and will also be stunt-trained and capable of faking death.