Rather than show a few scans and say what was good or bad about the book, I'm going to recount all of the good fight scenes because honestly, these three books are nothing BUT big running fight scenes and there's not much plot to discuss.
FIGHT ONE: Deadman VS. Etrigan/Jason Blood
WINNER: Deadman, who is actually able to possess Etrigan long enough to make him an effective fighting-force against the Black Lanterns in Gotham.
FIGHT TWO: Batman, Red Robin and Deadman Vs. A Whole Lot of Black Lanterns, including The Zombie Flying Graysons and Tim Drake's Zombie Parents.
WINNER: TKO to The Batman Family, who freeze themselves alive with a stolen Mr. Freeze gun in order to slow their vitals to the point of the death, causing the Black Lanterns to disperse.
The best of the three tie-in mini-series so far. Small surprise since it is the only one written by one of the main Green Lantern authors. Tomasi sneaked a few references to his Nightwing run into this book and it is all the richer for it. Definitely worth reading.