future history

noun2

1. •
   A postulated history of the future that is used by authors in the subgenre of science fiction to construct a common background for fiction.
2. •
   (humorous) Future events perceived or analyzed chronologically, as compared to history.

   • (the speaker is a time traveller from the future) Well, lad, I would tell you more, but that's just future history that you must figure out on your own.