Wolverine is not so good (contrary to what his fanboys believe) to beat Batman and Daredevil together. Throughing Nightwing in there totally dooms any chance that wolvie might have eeked out becuase NW can work so well with batman as each know eachother so well.
Wolvie is outclassed in brains by batman, fighting technique by batman and dd, agility by daredevil, senses by dd and strength by this combined force.
Let the fanboys bash away........
Depends on what Batman has in his belt.. They have to get close or they could stay far enough away but not to step out the ring. Also what can hurt wolverine that batman normaly carries with him ? If they all get close some one is going to get killed which is nightwing for the most part, and Bats/DD are good at fighting(very good) could beat on wolverine with gadgets but it only takes a hit from wolverine to kill you. Anyway I still think the trio wins.