Fast and Furious 7 was supposed to begin a brand new trilogy of the Fast and Furious films, although once Paul Walker passed, the plan was changed.
James Wan even confirmed that the original ending of Fast and Furious 7 would have lead on to new stories, but it was revealed that there would be more films when Vin Diesel let it slip at the very end of Fast and Furious 7, Kurt Russell would be added into the storyline from here on out.