Deadpool can take a **** load of punishment, but he's not Wolverine here. While I think Wade fights better than Logan, Wolverine still has ADAMANTIUM claws that will slice through Bruce's Batsuit easily. Won't be the same for Wade here. His guns and swords are pretty much useless considering Batman's Nomex/Survival Suit which I do believe he spawns now. When it comes to H2H Bruce is the better fighter, he'll bust a cap in Wade's ***! But what about Wade's joking? Well what about it, Batman deals with Joker, Penguin, Ra's, and has experience with Plastic Man. All of these guys taunt the **** out of their opponets in a fight but will it effect Bruce? No he's to smart for that. As someo0ne mentioned nothing in his belt will kill Wade but Bruce never does aim for killing anyway does he? 😛 He still has sonics, liquid-hydrogen capsules, numerous gas pellets, foam, and exploding weapons to keep Wade at bay. I also doubt Wade will be able to keep up with Bruce when he pulls out his grappel guns and starts flying.
Every time Batman comes up against someone more powerful, you can count on some zombie to drone, "given prep, Batman would take him." That's lazy.... HOW would he take them? Show some imagination. Also, while, yes, Batman could take down many opponents far more powerful than he is... he couldn't take down any and everybody (some idiots think he could beat a Celestial for God's sake!) If Batman and Deadpool were both instantly teleported to a neutral site, no chance for escape, and force to fight to the death, Bats is in trouble. 'Pool is tailor made for Bruce... strong, fast, highly skilled, tones of weapons, healing factor... he'd win 6/10. Believe me, I think Deadpool is navel lint to the great Batman as a character- but he has trouble in this one.
P.S. On Bruce's turf, and given time to (groan) prep, Batman wins everytime- he'd naturalise his healing factor and rig custom made traps.