Dork Note: Comic book series may not be completed for a variety of reasons...sales too low, the publisher ceases to be, personal conflict, or the creative team just gives up. For whatever reason...I just have to say I DO NOT GIVE A FUCK!!! I WANT TO SEE THE STORIES FINISHED!
1963, written by Alan Moore and a variety of artist was originally released in 1993.
Clipped from Wikipedia: The series has never been finished as originally intended. When first announced, the limited series was supposed to be followed by an 80-page annual, illustrated by Jim Lee, in which the 1963 characters were sent thirty years into "the future", where they met then-contemporary 1993 characters published by Image Comics. Moore intended to make a commentary on how the air of "realism" brought to Marvel Comics in the early 1960s had paved the way for the "mature" and "grim and gritty" American comics of the 1990s. Unfortunately, Moore was less than halfway through writing the script for the annual when Jim Lee announced that he was taking a year-long sabbatical from comic book art. Moore put the script aside, and after that year had passed, many things had changed. Rob Liefeld had left Image, which meant that some of his characters could not be used. Jim Lee was swamped with work and unlikely to be able to complete the work. The tide had changed, and superhero comics had begun to get less and less gritty, and Moore states his growing disinterest with writing superheroes.
Dork Note: There was supposedly personal conflicts between creators, but that is just rumors.