Deathstroke gets a contract to kill someone important in Gotham. He hears that Batman is out of town so he takes the contract (though he would of taken it anyway). As he finishes the contract and attempts makes his getaway, Batman suddenly pops up. Batman was informed by Alfred of Deathstroke's visit to town. They exchange dialogue and begin to fight on the rooftops of Gotham.
New 52 Deathstroke. Nth Metal armor, Sword, 2 pistols and 1 machine gun. Not fighting to kill Batman (since he wasn't paid to)
New 52 Batman. Standard equipment. Keep in mind the abilities and durability of the Batsuit in New 52. Morals on