Originally posted by Parmaniac
As in he messed with his shit?
It starts with Luthor prepping for Joker using a force field to block Joker gas - but Joker had already prepped for that and created a special blend that goes through forcefields.
Then skips to the present, with Luthor trying to get into his secret cabinet of toys, only to find Joker had wrecked it all. And infected every member of the Legion who Luthor had invited up to the moon. And turned the entire base into a deathtrap for Luthor.
Whilst Luthor had been prepping to take out Joker.