In no particular order:

Have a Blast
Kidnapping
Fizzle
Garth
Dual Nature
GCPD Headquarters
Huntress
Tower of Babel
Teen Titans Go
Firefly

how about :

1)fizzle (of course ...good bye gamma bomb!! i really do like having my big batman out after waiting all game to play him!)

2)clench virus ( wtf!!! this card is twisted..i can see the doom assassin deck already...3 clench viruses and a team up, by turn 5...gross!)

3)wondergirl cassie ( just asking for a personal forcefield...)

4)museum heist ( instand card advantage...either they discard one or let you draw 2?...yummy)

5)kidnapping( i have lost a few games for using this card already, but it was so much fun to do, that it was worth it ...i got to kid nap superman!!!)

6) batman 7 drop( once more, i love card advantage, and that is what this game was missing for me was a way to draw cards!)

7) utility belt!!!( my friend hates utility belts so much now, as i always wait to put it on batman when he plays league against me. makes sure that batman is safe from lady shiva ;) )

8) dick grayson 6 drop( more card advantage...and it works whether he is the attacker or defender...? moist)

9) dick grayson 4 drop ( punishes army decks but good! makes sure that your opponent has to be careful with who they recruit, and when)

10) batman 3 drop ( say goodbye a little longer, and for good to those pesky ongoing plot twists, such as clench virus)

11) (honorable mention) BAT SIGNAL!!!!!!!!!!(a search card that allows for an actual card advantage gain...? sign me up! and it only costs one! (if i am playing batman, you can bet the fizzles aren't far behind!)