This issue answers the question "what happens if we are invaded by creatures from the 5th dimension. As more of Mxyzptlks people are coming to earth. It is established that Johnny Thunders lightining bolt is a djinn, as well as the people of the 5th dimension.
The Former hero Triumph is trying to sell some of the stuff he took from the JLA trophy room when he was a member. The villains he is selling the asrenal decide to kill them, yet unwittingly release another Djinn named LKZ, who returns him to his Triumph self ( with a better haircut ) and then begins to wreak havock.