Oddly enough I had this idea the other day.
Eighteen year old Bruce Wayne has joined a circus in Europe, training with an American called Boston Brand. Three MIT undergrads on vacation, Barry Allen, John Henry Irons, and Ray Palmer, meet suspicious and moody Wayne. Wayne makes a snide remark about having graduated from MIT when he was 14, and a second degree from Yale when he was 18. The three undergrads get uppity and what they regard as an obvious lie. They form the belief that Wayne is actually a cat burglar who has been plaguing some wealthy people in Europe.
Turns out Wayne is stealing stuff: advanced car designs from a drug lord, some weapons designs from an Australian criminal named Harkness, body armour prototypes from the HIVE. They are about to bust him when a Japanese guy named Asano Nitobe and an American women named Christine St Clair intercede. Nitobe says they are from Interpol, and St Clair arrests Wayne. Wayne is lead away in handcuffs to be taken to Nitobe's private jet. Nitobe stealthily unlocks the cuffs while distracting Palmer, Irons and Allen. The three college guys all think how cool it is to fight crime and put a bad guy away, and Allen is inspired to become a police scientist.