Selina sabe porque é uma armadilha, ela está na liga com Bane neste momento.
Do script:
Batman picks off more and more Mercenaries. Screams echo...
Batman follows Catwoman through the dark tunnel.
CATWOMAN - Just a little further.
A grate slams down, separating them - the lights come on. He is deep inside.
INT. BANE’S LAIR, SEWERS - CONTINUOUS
Mercenaries look down on him from above. Catwoman turns.
CATWOMAN - I had to find a way to stop them trying to kill me.
BATMAN You’ve made a serious mistake.