Wow this is a tricky one. I guess it goes to whoever the first is to take out an opposition member and make use of the numbers, so either GA gets knocked out early when one of the Marvel 3 get in close or takes out one of the other three from range and DC take it.
Black Panther could really give Batman a run for his money though, and in DareDevil you have someone who may match Nightwing in agility and has the radar sense going on. DC may work together as a team better though and that might see them through.