Story: "Merry Christmas, Justice League -- Now Die!" (21 Pages)
Mark Waid (plot, script)
Comment: Most of this story is entirely imaginary, including appearances by Aquaman, Batman, Flash, Superman, Wonder Woman and Neron
To entertain Woozy Winks' nephew, who does not believe in Santa Claus, Plastic Man tells him of how Santa Claus came to be a member of the Justice League, having helped them to defeat Neron by giving him a Christmas present while expecting nothing in return.
As he comes to the end of his story, he is amazed to see Santa Claus outside the window. Unknown to him, it was actually Martian Mnahunter in disguise - he and Green Lantern happened to be in the area apprehending the Time Commander. Unknown to them, Santa Claus really was in the area, though...