Hyperstorm's one of the most powerful physical characters in marvel...he's also one of the smartest human beings...certainly on Doom's/Richard's level...He is far more dynamic and powerful than JLA villains like Shaggyman and Deathstroke...if those two can give the JLA trouble then how can one member stand up against one of the most powerful and intelligent human marvel characters.
Originally posted by The Flash
Deathstroke didn't even defeat the best members. He got lucky defeating Flash and Kyle. That's it.Shaggy Man is like Doomsday. The same thing won't work on it twice so it's believable that it can defeat the JLA.
Hal is also smart. I would list some examples, but I'm too lazy.