- Real name: Unknown
- Identity: Public
- Alignment: Bad
- Gender: Male
- Hair: Blond
- First appearance: JLA Secret Files vol 1 #3 (Dec 2000)
The origins of the being calling himself the Advance Man are as yet unknown. He apparently is a being of considerable cosmic power who hires himself out to other galactic powers, and uses his impressive abilities to pave the way for his employers to conquer other worlds.
How many planets the Advance Man is responsible for seeing conquered during his career is not as yet known. Thus far, the only failure that he has endured is when he attempted to position Earth for conquest by the pregnant alien Plura, only to be beaten back by the heroes of Earth, led by various temporary incarnations of the Justice League. Plura was ultimately chased away by the heroes, and the Advance Man fled, escaping capture.
As of this writing, the Advance Man remains at large, and there is always the possibility that some other would-be conqueror will employ him again in an effort to take over the Earth.