With Ryan Reynolds sitting behind a desk in his office – reading his PEOPLE's Sexiest Dad Alive issue and surrounded by his Sexiest Man Alive cover – Corden comes in to offer a few suggestions for a possible Deadpool sequel.
"I watched it, I loved it, but I couldn't help but feel it was missing something: a sidekick," he explained on The Late Late Show Thursday night.
After convincing Reynolds, 39, to let him pitch a few ideas, the actor reluctantly sat back as Corden presented an elaborate array of costumes.
First up, Corden, 37, came out in dressed in a silver bodysuit with a blue lightning bolt on it.
"The Iceman," he explained. "The Iceman cometh all over you – he probably doesn't say that."
But he didn't stop there. From Strawberry Shortfuse, to a clam, the magic clown and Potato Man, Corden tried nearly everything to impress Reynolds.
"All I'm saying is, if you don't do this, Marvel will," Corden said as he stood dressed in a potato costume. "They've made that quite clear. They think Potato Man is its own entity."
Luckily, Reynolds came up with the perfect solution for a sidekick: Double Deadpool.
Check out the video above to see how the new crime-fighting twin duo work out, and what Corden found difficult about the Deadpool costume.
Meanwhile, Blake Lively can't seem to get enough of watching her husband on screen. The actress took to Instagram on Thursday night to confess that she's seen Deadpool three times already.
"I should be embarrassed to admit it at this point – THIRD times the charm!!" she captioned a picture of her movie ticket.
Just think about many time she'd see the movie if there was a Double Deadpool.