[Verse 1: Deadpool]
Look
It's Marvel's main mercenary
Here to make another mess
And about to flip the kill switch, son
'Cuz Deaddy knows best (trust me)
From what I hear you tend to get a bit unruly
I'll tame you with a machine gun
Is that animal cruelty? (I don't think so)
I think that you're the crazy one
To think that you could handle me
It's total annihilation
Well, kinda like your family tree
There is one mystery that still needs solvin'
Who should I send your head to?
Alfred or Robin?

[Verse 2: Batman]
(Look) I'm just getting started
But it's already over
Check my back issues
I already killed the Joker
This red clown wants to face cold justice
And this'll be your darkest night
Like the winter solstice
I put my city on my back
No powers
And judging from your stench
Your biggest cause is no showers
I anticipate this will be our
One and only meeting
Because you can't regenerate
From a verbal ass beating
[Verse 3: Deadpool]
You wanna talk beat downs?
I'm a weapon X survivor
I'll dice you into an entrée
Then blow you up
Like Macgyver
A comparison reveals
Solidity vs fragility
So tighten up your belt
'Cuz you'll need every utility
Your secret identity just means that
You're a two-faced
Penguin-suit-wearing
Wannabe and I've got a distaste
For billionaire bitches
Take your mobile and your kitty
But I wouldn't be caught dead
In Gotham Shitty

[Verse 4: Batman]
Trashing on Gotham
And calling me a phony?
I know you've got some screws loose
So I'll try to speak slowly
You experiment gone wrong
And worthless survivor
And I'll serve you in this battle
And then sell you back to Stryker
Regenerative Healing really will not be a factor
When I lock you in a dark cave
From here to ever after
The Dark Knight Rises
And the Dark Knight Returns
The Dark Knight will flame you worse
Than your third degree burns
[Verse 5: Deadpool]
You attacking me is nothing more
Than a bad itch
But I got your next movie title:
Rise of the Bat Bitch
I'm slicing and dicing
I never look when I'm firing
But the bodies are piling up
'Cuz this bat is expiring

[Verse 6: Batman]
You think you're clever
Well how about I sever
Your head from your neck
And we'll see who rhymes better
I'll bury you alive and
I'll wait for your screams
I'm the Dark Knightmare
Of Deadpool's dreams