Mr. Fantastic appears in 17 issues in this volume.
What if Spider-Man joined the Fantastic Four?
February 1, 1977
What if the Hulk Had Always Had Bruce Banner's Brain?
April 1, 1977
What if the Fantastic Four had different powers?
December 1, 1977
What If Rick Jones Had Become the Hulk?
December 1, 1978
What If Someone Else Had Become Nova?
July 1, 1979
What if Spider-Man had Never Become a Crimefighter?
February 1, 1980
What If The Avengers Had Fought the Kree-Skrull War Without Rick Jones?
April 1, 1980
What if Invisible Girl of the Fantastic Four Married the Sub-Marriner
June 1, 1980
What if Dr. Doom Had Become a Hero?
August 1, 1980
What if Captain America Were Elected President?
April 1, 1981
What if the Avengers Defeated Everybody?
October 1, 1981
What if Wolverine had Killed the Hulk? \ What if the Fantastic Four had Never Been?
February 1, 1982
August 1, 1982
What If the Fantastic Four had not Gained Super-Powers? Plus! What if Richard Rider had not lost the Power of Nova?
December 1, 1982
What If The Beast and the Thing Continued to Mutate? Plus, What if the Silver Surfer Lost the Power Cosmic?
February 1, 1983
What if the Invisible Girl Had Died?
December 1, 1983
What if The Hulk went berserk?
June 1, 1984
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