The Justice Leagues storyline continues in this issue Hector Hammond has done what no other super-villain has ever been able to do! With the help of the Advance Man, on the job for client Plura doing the legwork to get the Earth move-in ready, he gave Hammond the opportunity to wipe out and eliminate the JLA! Now, the world has forgotten about the Justice League of America because of Hammond; but, when he realizes the extent of the Advance Man's plan, he sends out another worldwide message to remember the Justice League of A- !

Justice League of Aliens 1 is the fifth of six chapters in the March 2001 fifth-week event Justice Leagues; book-ends written by Tom Peyer, the previous chapter written by Paul Grist, this chapter by Judd Winick; covers by George Perez and interiors by Ethan Van Sciver, Aluir Amancio, Javier Saltares, Coy Turnbull, Mike S. Miller and Justiniano.