CHAPTER III: DESPERATE MEASURES
Batman began to shoot at every one of the hostiles. Normally, he would not use this form of brutality, but he still doubted that they were people. Clearly, the red and green robot wasn't (Batman didn't actually know who he was, so he just assumed he was the Vision). Thor was a god, so his no-killing rule didn't really apply to Thor. "Take cover!" yelled Captain America. The aliens did so, except Thor. Thor waved his hammer and launched it towards the Batmobile.
Batman pressed a button on the Batmobile which activated its thrusters, enabling it to dodge the hammer. Thor fell to the ground, forgetting that his hammer allowed him to fly. Iron Man was tired of playing games. "That's it," he said "I'm taking this to another level." He pointed the palm of his left land towards a nearby building, shooting a laser at the once proud skyscraper and tumbling it to the ground. "No!" exclaimed the Batman. He threw a smoke pellet directly at the Avengers, enveloping them in smoke. By the time the smoke cleared, Batman, Robin and Nightwing were already gone. "I'm initiating Protocol Dementia," Batman said to Nightwing. "Are you insane!?" exclaimed Dick Grayson, "You're gonna let the Joker loose?"
"I don't have a choice."
"Like hell you do! We can take them."
"We couldn't now. Desperate times call for desperate measures, Dick." Nightwing stayed silent for about three minutes, then spoke again: "Are you really sure you want to do this, Bruce?"
"Positive."
Arkham Asylum, Arkham Island, Gotham City
Batman couldn't believe himself. He was about to let the Joker, the one who paralyzed Barbara Gordon, killed Jason Todd and Sarah Essen, and tormented him for his entire career, loose in Gotham. Batman stopped in front of a cell, two guards standing by the door. The guard on the left nodded his head at Batman, and the Dark Knight reluctantly opened the cell door. Inside sat the Joker, the maniacal criminal mastermind that had been a bane upon Gotham for years. "Hey Bats," he said, "What brings you here."
"I need your help," said Batman. The Joker laughed. That was almost literally the funniest thing he had heard in his life.
"Help with what?"
"I need you to help me take care of a few aliens."
"Really Bats? Isn't this a job for your Justice League friends?"
"They're busy."
"Alright, Bats." The Joker smiled for a second. "And if I betray you?"
"I'll beat the living hell out of you."