When I first joined the Justice League I felt intimidated. I was just a man in black with toys and training surrounded by gods. But with each adventure we shared I saw their flaws. And one day it hit me... their powers were no different than the guns criminals used on the streets of Gotham. And finally, I realized...the Justice League are a superstitious and cowardly lot!
The Justice League was a team of heroes that protected Earth -22. After Batman killed the Joker and became exposed to a toxin that turned him into the new Joker, the new "Batman Who Laughs" killed the entire Justice League as he caused destruction on his homeworld.