The trailers for "F9" let us in on a big secret right away. Dom has a long-lost brother named Jakob (John Cena), and things are not so great between the two. There was never even a mention of Jakob in any "Fast" film before, with Mia Toretto (Jordana Brewster) even noting she only has one brother in "Fast & Furious." If that is true, that would mean Dom is a half-sibling to Mia and Jakob, with the latter two not being related at all. Of course, we don't expect this to be the case.
It's highly likely that Mia's line from "Fast & Furious" doesn't hold water these days, because the introduction of a new sibling likely wasn't in the minds of the screenwriters 12 years ago. Her quote could also have been about how she perceived her family, especially now that we know Jakob is estranged from her and Dom. Perhaps she never saw him as a real brother, which explains why she said Dom was her only one. If this is the case, all three siblings share the same father: Jack Toretto. Although we never saw him, we know Jack died in a stock car race after he was run off the track by another driver in 1989. The matriarch of the Toretto family has also never been mentioned — something fans are hoping to get some clarity on with the introduction of Jakob.
