JLA #15 featured a plethora of guest-stars in each JLAer's nightmare...brought about by THIS man:
continued after the jump!
The Justice League's Allies:
THE JUSTICE SOCIETY OF AMERICA
His three worst enemies
A pirate who wears a special oxygen mask that also emits laser beams.
A pirate with frighteningly violent weapons.
Although he is Aquaman's half-brother, he hates him. He is a scientist who is also a sorceror.
The Flash's six most powerful enemies
1. CAPTAIN BOOMERANG
An expert at throwing boomerangs, he also uses special Laser Boomerangs and Jet Boomerangs.
2. WEATHER WIZARD
The wand he owns controls the weather.
3. CAPTAIN COLD
A cold-hearted villain armed with a freeze beam gun.
4. MIRROR MASTER
A villain who uses mirrors as weapons.
5. HEAT WAVE
A villain armed with a mini-flame thrower.
6. DR. ALCHEMY
A villain armed with a magical stone that can change object's molecular characteristics.