The two heroes continue crawling through the vent. As they do, Barbara talks to them on comms.
Barbara on radio: Guys, I'm patching you into the guard radio feed.
They both listen and they hear the guards on the feed.
Guard on radio: Steve, more BlackGate prisoners. By the boiler!
Steve on radio: Who's that behind them? Oh, my gosh... It's Joker. He's free. How'd he break out?!
Guard on radio: Wait! Someone is behind him! Is that...Oh, my gosh! It's Venom! What's he doing here?!
Then, the feed goes static.
Barbara on radio: Sorry, feed's down. Comms are up and down like crazy. It's not good. I'll keep trying.
Spider-Man: You do that. Meanwhile, we'll keep trying to stop him.
They reach the end of the vent. They kick the grate off and they're back in the processing corridor. The guard they talked to earlier manages to open the door. He runs in. They both follow after him. They see him standing by a window, where other guards are at on the other side.
Guard: It's sealed. No way in or out. Dang it!. They're trapped in there.
Just then, the woman's voice speaks again.
Woman on intercom: Warning: Decontamination room. Toxins detected.
Then, the window seals up. The guard runs to it and bangs on it as the guards inside all scream and cough as the toxin covers them up.
Woman on intercom: Warning: Decontamination room. Area sealed.
Guard: What is that stuff?
Batman: Joker toxin! Listen! The room is full of poison gas. Anyone caught in there is dead!
Guard: Are you going to get in there and help them, Batman and Spider-Man?
They both look around and look up. They see a hole leading somewhere. They both swing up and crawl through another vent.
Batman: This isn't a simple escape attempt. Joker's been planning this.
Spider-Man: He must have thought of this for a long time, and he's got my villains involved in this.
They both continue crawling through the vent and they make it inside the decontamination room. They're on platforms and pipes. Just then, they see someone holding on the ledge of the platform by them. It's a guard.
Guard: Please help me.
Spider-Man runs to him and grabs him before he could fall off. He swings on other platforms to save the other guards. Batman watches him and he's impressed with it. Spider-Man then spots a Blackgate convict hanging on a ledge below the gas.
Convict: I can't believe he left me here! That son of a-
Spider-Man grabs him and pulls him up. Then he webs him to the platform and knocks him out. Batman joins him. They both look around and then they spot something on the wall below.
Batman: Hmm. There's the extractor control point. A well-aimed Batarang should power it up.
He takes out one. He aims and throws it. It hits the control point, activating the fans in the room. The fans suck up the gas, clearing the entire room. After that, they both jump down from the platform. Spider-Man looks around and sees a lot of dead guards and prisoners on the floor. He frowns at this.
Woman on intercom: Attention. Air purity is now at normal levels. Attention. Decontamination room access is now permitted.
All of the guards in the room cheer for them.
Guard: Whoo! Go Batman and Spider-Man! You rock! Joker doesn't stand a chance!
Spider-Man chuckles and Batman nods. They both leave the room and enter the transfer loop. As they do, they look down and see green arrows and smile faces on the floor. Joker speaks through the intercom.
Joker on intercom: What are you waiting for? I'm so close you can almost taste me.
They both follow the trail. Two of Joker's men fight them, but they take them down easily. After they take them down, they look ahead and see Joker's smiling face on a big door. They run to it and the door opens. They walk inside and there he is, Joker. He's standing on a container hanging on chains below a mist. which can go miles down below. Joker looks at them.
Joker: What took you so long? (Chuckles)
Batman throws a Batarang at him. He ducks down and it hits the chain.
Batman: There's no escape, Joker. We will find you.
Spider-Man: Yeah! Now or later, we will stop you!
Joker: I'm counting on it. Just not yet!
Just then, the container opens up. And coming out of it is a big guy. His muscles are half big with his chest and one of his legs. His eyes are green and he growls at them.
Joker: Oooh. He's a big one.
Spider-Man: Oh, boy. Bats, is he Bane or someone who works for him?
Batman: Neither, but something tells me this is different.
The big guy roars at them. They both get ready to fight him. He stomps towards them. He picks up a dead guard and throws it at them. They both move out of the way. He roars and charges at them. Batman throws a Batarang at him and it hits him in his face. He runs out of control and he hits the wall hard. Spider-Man runs at him and punches him rapidly. He growls and tries to hit him, but he moves out of the way. The fight lasts for about three or four minutes. He throws another dead guard at them, but they still move out of the way. They both run at the big guy and they both punch him in the face hard. He groans in pain as he holds his head. Then he falls on his back, out cold. Joker, who watches the whole fight is unimpressed.
Joker: Well, that was unexpected, wasn't it? Oh well, note to self, need stronger test subjects.
Spider-Man: What are you talking about, Joker?
Joker: Oh, nothing important, yet. Seeing as how I'm feeling generous, I'll give you this one for free. (Stands over the ledge) Knock me off, I dare you! End this, pull the plug, stop me once and for all.
Batman prepares to throw another Batarang at him and Spider-Man prepares to shoot web at him, but then, they both hesitate. Then they both put their arms down. Joker starts laughing.
Joker: You're both getting too predictable, Bats and Spider! Well, I'd love to stay and chat, but I have a party to organize. I've got guests flying in from all over Arkham. You'll see. Oh, and by the way, Spider. More of your buddies are coming in too. (Laughing)
He continues laughing as the chains pull the container through doors and the doors close.
Spider-Man: Dang it. More of them.
Just then, one of the guards in one of the offices behind an electric gate wakes up.
Guard: Ahh... My head! (Sees them and unlocks the gate) Quick! Get in here before more of them come!
They both walk in the office and he looks at them. They see another guard is with him, but he's out cold on the floor by the desk.
Guard: They came out of nowhere! I dragged Jerry in here, powered up the gate. Must have passed out.
Spider-Man: Good thing you did. Otherwise, they would have killed you both.
Guard: Yeah.
Batman: Joker went through that door. What's on the other side?
Guard: We call it Extreme Isolation! Only way in is via the transport system.
Batman: Open it!
Guard: Not a problem. I'll just need to call another cell. (Walks to the control and pushes some buttons) Ok. (Looks at the monitor) Something's wrong here. The main security loop is locked.
Just then, Joker appears on another monitor on the desk. This time, Venom is with him.
Joker: Having a little trouble up there?
Batman: Joker!
Spider-Man: Venom!
Joker: You were expecting maybe Two-Face and Scorpion?
Spider-Man: There's no escape, you two!
Venom: (Laughs) Stupid fools! We don't want to escape. We're having too much fun.
Joker: I even have you both here to keep a smile on my face.
Batman: Not for long.
Joker: Really? We'll see. Ta ta.
Venom: Oh. Before we go, we forgot to say. Just in case you were planning on following us, we've arranged a little insurance.
Venom turns the camera to another video monitor. It shows Gordon with Boles. As Gordon turns around, Boles hits him in the back of his head and knocks him down.
Joker: Gordon is on his way to Harley and Shocker as we speak.
Batman: Officer Boles.
Joker: (Laughs) If we see you both try to follow us, he dies. Harley and Shocker are looking forward to it. Maybe I'll film it and post it on the internet.
The monitor goes static. They both look each other and try to think. Then, the guard speaks to them.
Guard: The transport system is down. Best I can do is open the door you came in. Sorry.
Spider-Man: It's cool. Thanks though. Listen, turn back on the gate and keep it powered up.
He nods and they both leave the office. The guard turns back on the gate.
Batman: We should go back to the Holding Cells. Boles wasn't too smart. He'll have left a trail.
Spider-Man: Yeah. Good idea.
As the door they came in unlocks, Barbara speaks to them on the radio.
Barbara on radio: Batman! Spider-Man! What's happening?
Batman: Joker's escaped. He's sealed himself off with Venom. He's got your father!
Barbara on radio: (Gasping) Dad!
Batman: Don't worry. We're getting him back!
Barbara on radio: Ok. I know...but...
Spider-Man: Barbara, we're getting him back! Joker will not win. We won't let him.
Batman: We're starting where he was taken. A guard name Frank Boles attacked him. If we find him, we'll find your father!
Barbara: Guys, hurry! Please.
Spider-Man: We will.
They both run through the door and make their way back to the Holding Cells.