I'll be adding to this set as I go along:

Aquaman, Orin
Aquaman, Arthur Curry
Aquaman, King of The Seven Seas
Barbara Gordon <> Batgirl, Classic Heroine
Batman, Dark Detective
Batman, Take Charge
Big Barda, Enforcer
Dinah Lance <> Black Canary - Sonic Scream
Conner Hawke <> Green Arrow - Prodigy
Oliver Queen <> Green Arrow - Straight Shot
Ted Kord <> Blue Beetle, Adventurer
Wally West <> The Flash, Scarlet Blur
Hal Jordan - Timely Hero

Your Hal Jordan link didn't work, everything else was fine.

Overall scope and variety seems rather limited. Cards like Conner Hawk I don't get. Why would you give up a 7/6 character for a turn (exhausting him) to give a lousy +2 ATK? That's 5 attack worth you're giving up for 2. In some limited capacity, I suppose it'd act kind of like a really small Nasty Surprise, except without really any surprise, and not very nasty.

I'd like to see more variety in your power up abilities, like the powered up to exhaust a character, rather than more counters.

I'm kind of digging ol' King of the Seven Seas, though he might be a bit too powerful (just think about recovering 2-3 savage beatdowns a turn, and then recovering them again the next turn). Maybe make it a once per game effect, or make it so that if you do take any cards into hand, your cards are placed out of the game instead of the KO'd pile this turn. That way, you can't keep getting the same cards over and over again.

No offense Cosmic, but that Barbara Gordon hase the most worthless effect I've I've seen:

"Ally: Whenever Barabara Gordon becomes powered up, you may discard a JLA or Gotham Knights character card. If you do, draw a card, then discard two cards from your hand."

One, thanks to ally it can only trigger for Babs and an adajcent character both are powered up for the same attack. Two, you loose three cards to get one? The only time that is good is for Squadron (and every Squadron deck MUST have four of her); and it is totally opposed to Gotham Knights SOP.