Turns out that trucker wasn't the only explosion on that block we left off at, as Pyg's current residence goes up in flames, and he's none too happy, so he and his Dollotrons go a bit nuts, all while Batman is trying to take control of the chaos.
Elsewhere, Penguin comes to find out that Catwoman has infiltrated his offices within the Iceberg Casino, and she's looking for some missing Gotham Underground residents, believing he's the one who has made them disappear.
While Catwoman and Penguin have at it, as well as Batman trying to protect innocents from Pyg and his Dollotrons, Carmine Falcone and his new associates Roadrunner and Tiger Shark, set up another explosion, placing bombs within the Iceberg Casino by breaking in below and flooding it.
Before the bombs at the Iceberg go off, Penguin informs Catwoman that Doctor Phosphorus was working for him as an informant, in order to protect the Underground, so whoever is making residents disappear, it's not him. Then the bombs go off, and in the panic, Selina manages to rescue many people, while Pengiun struggles to grab as much cash as he can, but drops it in the water when Selina saves him from being devoured by Tiger Shark's whale.
Back to Batman and Pyg, Bruce finally gets through to the maniac by telling him he's being played by Falcone. Pyg learns the lab explosion was a set up to distract Batman, and instead of making art, he's just a pawn in someone else's plan. Pyg has a bit of an existential crisis after this, which is enough of an opening for Bruce to make his move and knock him out. But when the GCPD (Dickhead... Forbes) picks up Pyg, Forbes lets him go, making it a point not to work with or accept help from vigilantes.
That morning, Batman commends Catwoman on her good work, Penguin watches his legacy (and money) sink, and Pyg blows up Roadrunner for betraying him, declaring all of Gotham his new lab.