Deathstroke has taken up a contract on Spidey. On his way to kill Spidey he runs into Kraven who is also hunting Spiderman. The two of them only prepped for Spiderman and are completely unaware who the other is (so random encounter). They exchange insults and dialog and begin to fight.
This is New 52 Deathstroke he has 2 pistols, his sword, and his Nth Metal armor
Kraven has 2 Axe's duel wieldable with adimantium blades(to be fair), a spear, his cloths are vibranium weave (to be fair).