Universal’s biggest juggernaut franchise may soon get bigger, as the studio is in early talks with star Vin Diesel to make prequels and spinoff films set in the Fast and Furious universe.

The spinoffs and prequels under discussion would build out the series in a manner similar to the Marvel Cinematic Universe, focusing on as-yet unrevealed characters. One possibility is a film focusing on Dwayne Johnson’s DSS agent Luke Hobbs, antagonist and later uneasy ally to the series’ group of racing enthusiasts and thieves. Universal has similar plans for its stable of classic movie monsters that includes Frankenstein, Dracula and the Creature from the Black Lagoon.

However, while the talks are happening, we’re told Universal’s focus for now is on proper sequels in the series. Following the enormous success of Furious 7, which nabbed $1.5 billion at the box office earlier this year, the studio already has three further sequels planned, the first of which, Fast and Furious 8, is to be helmed by Straight Outta Compton director F. Gary Gray. Diesel has previously revealed that Furious 8 is the first in a new trilogy within the series that may bring it to a close.

Justin Lin, who directed the third through sixth films and is credited with turning them into a powerhouse franchise, has been the subject of periodic rumors that he may return. His work on Star Trek Beyond kept him out of Furious 8 however, but Vin Diesel has repeatedly said on social medal that he expects Lin to come back for future installments.

Variety first reported the news.