Haven't had chance to really test this as I don't play a Batman regularly but I've been trying out using MB back 3 against his jump ins whenever I come across a Batman online. While probably not necessary offline, I did find this worked very well online. You can get some very good damage:
MB-B3, J3, 11 Health Trait = 42%
MB-B3, J3, 1 MBSW, J2B1, Health Trait = 64%
The swamp hands combo builds around 80% of that second bar back too, I'd really like to play Batman offline a lot as it seems like his jump 2 wouldn't be as much of a problem offline.