Yay! Big villain team-up! It's too bad Ivy wasn't there and Riddler was off doing his own thing.
We got the first appearance of the Joker toxin. Still waiting on trick umbrellas, though.
Not sure where they're going with Barbara as the Demon's Head. I mean, if Ra's wanted her to lead the League of Shadows, then what did he want with Bruce. If Ra's al Ghul really is dead then I'm going to be rather disappointed.