Lawful definitely win vs Neutral and Chaotic, unless (and admittedly it's a fairly big issue) Dredd refuses to work with his team or outright attempts to take them down.
Good/Neutral/Evil is harder to call. Vader is the most powerful player on the field, then there is a tier of comparably dangerous people with Cap, Batman, Dredd, Deadpool and Cable. Rorshach, Lex and Joker can't get anywhere near those guys in a straight fight, so Vader is really disadvantaged by his other team members. Neutral have the best overall spread between the three members, but would have crappy teamwork (Dredd would almost certainly shoot Deadpool about ten seconds after meeting him, no way those two get along). Good have one member not capable of contributing much but the combined factors of Cap and Bats. Overall a really tough call.
but I just think any of these guys are going to have a horrible time actually stopping Deadpool...but with their skill and Vader's force powers, I could see them restraining him.