It’s a common model these days for movie series to conclude in two parts, perhaps with a cliffhanger in the middle.
Justin Lin was already attached to the tenth Fast & Furious film.
Infinity War and Endgame did very well for itself within the MCU using this idea, with the latter going on to become the highest grossing movie of all time.
Vin Diesel previously teased the conclusion of Dom Toretto’s character and the rest of his crew could very well be split into two movies in early 2020.