1986 - Marvel Super Heroes Adventure Gamebooks

This series of books, similar to the Advanced Dungeons & Dragons Adventure Gamebooks, was a single-player RPG adventure and used a lighter version of the Marvel Super-Heroes Role Playing Game (also published by TSR).

There were 8 books in the series which was released between 1986 and 1988.

And here's a full-page ad for the series from Dragon #125.

References:

- Demian's Gamebook Web Page

1986 - 1-on-1 Adventure Gamebooks

These 1-on-1 Gamebooks were released in sets of two boxed books. The idea was to have two players reading each book at the same time and would encounter each other and battle it out. Only 10 of the 11 books were published and there were only 2 Marvel Super Heroes books of the 10.

Marvel Super Heroes Adventure Gamebooks, based on the popular Marvel Super Heroes roleplaying game, allows you to play as your favorite hero and battle some of the vilest villains in the Marvel Universe. One-on-One allows you play as either the hero or the villain. Includes two gaming books. Softcover (2 vollumes with Slipcase), 5-in. x 7 1/2-in., 320 pages (2 Volumes), B&W. Cover price $5.95.

For more details, check out:  Demian's game book web page

Daredevil/Kingpin - The King Takes a Dare (1987)

Fantastic Four/Doctor Doom - The Doomsday Device (1986)

Doctor Strange/The High Priest - Prisoner of Pharaoh's Tomb (unpublished)