Writer-artist Walt Simonson took over as writer of Fantastic Four with #334 (December 1989), and three issues later began pencilling and inking as well. With brief inking exceptions, two fill-in issues, and a three-issue stint drawn by Arthur Adams, Simonson remained in all three positions through #354 (July 1991).
Simonson, who had been writing the team comic The Avengers, had gotten approval for 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 members Thor and Iron Man, which he had been precluded from using in The Avengers.
After another fill-in, the regular team of writer and Marvel editor-in-chief Tom DeFalco, penciller Paul Ryan and inker Dan Bulanadi took over, with Ryan self-inking beginning with #360 (Jan. 1992). That team, with the very occasional different inker, continued for years through #414 (July 1996). DeFalco nullified the Storm-Masters marriage by retconning that the alien Skrull Empire had kidnapped the real Masters and replaced her with a spy named Lyja. Once discovered, Lyja, who herself had fallen for Storm, helped the Fantastic Four rescue Masters. Ventura departed after being further mutated by Doctor Doom. Although some fans were not pleased with DeFalco’s run on Fantastic Four, calling him “The Great Satan”, the title’s sales increased over the period.