Fantastic Four (comic book) from US Fantastic Four 1, but this was replaced by The Invaders towards the end of the run. In 1978 that series merged into "Mighty World Of Marvel" returning the FF to their original home alongside the Hulk. Their last adventure in that title was issue 329, when they were moved out so that the comic could be relaunched as "Marvel Comic" in early 1979. Their adventures briefly moved back into "Spider-Man Comic" before stopping shortly after John Byrne took over pencilling chores on the strip. In March 1980 Marvel UK launched the Fantastic Four Pocketbook reprinting Lee and Kirby
Fantastic Four (comic book) Reed and Sue to join that team after Engelhart had written them out of "Fantastic Four". Yet by "The Avengers" #300, where they were scheduled to join the team, Simonson was told the characters were returning to "Fantastic Four". This led to Simonson quitting "The Avengers" after that issue. Shortly afterward, he was offered the job of writing "Fantastic Four". Having already prepared a number of stories involving the Avengers with Reed and Sue in the lineup, he then rewrote these for "Fantastic Four". Simonson later recalled that working on "Fantastic Four" allowed him the latitude to use original Avengers