Joker's been a naughty, naughty boy.
After a bit of prep and a little luck, Joker has insinuated himself as the Spectre's new "rightful host", and has absorbed nearly all of his power. His twisted mind, however, sees "punish the guilty" more along the lines of "slaughter everyone while laughing and reveling in his infinite power".
Before each match, he gets the name of his next opponent and one day to rest and prepare. How far does he get?
Round 1: Black Adam
Round 2: Phantom Stranger
Round 3: Darkseid
Round 4: Trigon
Round 5: Parallax (Hal Jordan host)
Round 6: Imperiex Prime
Round 7: Batman One Million