The timeline is a bit more complicated than many may anticipate. Through nine films, the chronology of events was changed due to when the death of Han Lue (Sung Kang) takes place.
Han died during one of the climactic chase scenes of Fast & Furious: Tokyo Drift, the third movie in the franchise. This was not the end of Han's time in the franchise, though. Kang reprised his role as Han in Furious 7.
The trailer for F9 surprised fans with The Fate of the Furious but is a few years older in the F9 trailer.
There's also another quick moment in the F9 trailer that helps place the film in context with next entry in the Fast Saga.
With the timeline straightened out, the trailer for F9 will still leave fans wondering how Han is back in this story after his apparent death. That isn't the only reveal that the movie needs to explain either, as the trailer reveals John Cena's Jakob is the brother of Dom, even though it has never been mentioned that he has other siblings besides Mia. And speaking of Mia, her return in the movie raises questions about how F9 will explain Brian O'Conner not being part of the story anymore. As the franchise continues to move forward, F9 will be able to fill in gaps, answer some of these questions, and set up more stories for the future.
