precanon

adjective2

1. •
   Predating the development of a religious canon.

   • The gifts of apostle and prophet were evidently foundation gifts, particularly related to the precanon era of church history (see Ephesians 2:20 and Hebrews 2:4). — 1980
2. •
   Set before the main or accepted canonical chronology of a fictional universe.

   • “Well, supposedly RoGII: War in the Realms, as you know: But it’s precanon, right? More what I'd call a narrative possibility space bounded by the strategic parameters of the game.” — 2013