Nightmares of Futures Past is a supplement published by TSR in 1987 for the superhero role-playing game Marvel Super Heroes that describes a new dystopian setting.

[2] Although the book describes this new world, with background, maps, non-player characters and tips for the gamemaster, it does not contain any adventures for this setting.

[1] TSR subsequently published three adventures for this setting the following year: The X-Potential, Reap the Whirlwind, and Flames of Doom.

Wallis warned readers that this turned the super-hero genre on its head: "The major differences between Nightmare and normal [Marvel Super Heroes] (or indeed any superhero game) is that the characters will be universally hated and distrusted, and there is nowhere that is safe ...

This adds an edge of danger, excitement and depth that I find lacking in normal superhero games."