Joker:

"Awww. Too bad. So sad!"

"Oh I'm sorry! Did I kill your friend? Oops! My bad! Haha!"

"Looks like I'm gonna need to find a new playmate. Oh, and we were having so much fun, too!"

"Ding dong, the Bat is dead! Which old Bat? The dumb old Bat! Ding dong, the dumb old Bat is dead! HAHAHA!

"Aw... Gotta say, I thought you'd have more fight in you. A lot more fight."

Deathstroke:

"Know that you die with honor, which is more than can be said for most."

"You fought well, Batman. But I am stronger. Faster. Smarter. And so this ends the only way it could."

"You cannot match me." (mobile game only)

Penguin:

"Boys, get 'im outta here. And don't ding up any of the gear. That's worth some money."

"And THAT'S why I'm the boss! Now if you'll excuse me, I got business to attend to. Piss off!" (throws cigar at screen)

"Ahh, it's a real shame you're dead. You're actually worth more alive! (laughs)"

Black Mask:

"I was hoping you'd at least live long enough to see what I've got planned for this place."

"With you out of the way, Gotham's mine for the taking. And sooner than I thought."

"That's it?! All this build-up and he falls over like he's made of sticks?! What an anti-climatic ending!"' (Kicks Batman)

"What? The party's already over?! But I was just getting warmed up!"

"I didn't think you'd be this easy. Oh well, live and learn."

Copperhead:

"I bet you never expected the end to come like this."

"Now that you've been dealt with, I've got a prize to collect."

"Lo siento, Batman. Pero mi veneno es la muerte. (Sorry, Batman. My poison is death.) Now sleep!"

Bane:

"I hoped for more of a fight."

"That was... unsatisfying."

"And I had such big plans for you."

"I'm disappointed. I expected better from you." (Venom Bane)

"So this is how the Bat finally falls." (Venom Bane)

"You've been... broken." (Venom Bane)

"First I broke your spirit. Now I break your back." (TN-1 Bane)

"He is gone, Batman. Because of you." (TN-1 Bane)

Anarky:

"We could have accomplished such great things together..."

"You think you're a hero, but you're really just a symbol of how low this city's fallen. We're better off without you."

Shiva:

"You fought well. And so I grant you the favor of a quick death."

"I take no pleasure in your death. But I see no other way."

Enigma/The Riddler:

"And here I thought I'd finally met my intellectual equal... So much for that."

"Brains always triumph over brawn, my friend. Always.

Mad Hatter:

"Oh dear, oh dear, what have I done? Oh, that's right - I killed the Batman!"

"O Frabjous Day! Callooh! Callay!"

Branden:

"You should've turned yourself in when you had the chance. All right, boys, let's get this trash out of here."

"Hmmm. Not much to look at from up close. Don't know why everyone was so afraid of him."

"Looks like justice is served, fellas. Now to see what's under that mask."

Killer Croc:

"I'll line my lair with your flesh, Batman!"

"Looks like dinner is served." (eats camera)

"Ah... The sweet scent of defeat."

Firefly:

"Awww, look at that poor little bat. Got his wings clipped."

"Gotham's gonna BURN! And with you out of the way, there's no one left to stop me!"

"Well, it looks like this is goodbye."

Deadshot:

"Bullseye."

"A nice clean kill. Just the way I like 'em."