Family is an integral part of both franchises, but it's interesting to see who ultimately becomes part of that family. While other action flicks may see the bad guy end up dead or in prison by the end of the story, both of these series often have the antagonist join the side of good down the road.
"Fast X" exemplifies this with Dom's brother, Jakob (John Cena). In "F9," he worked for the villain Mr. Nobody, being a real pain in Dom's side. Throughout the events of that movie, Jakob gets double-crossed, so he's primed for a redemption arc in "Fast X." This isn't the first time this has happened in the franchise, either. Deckard Shaw (Jason Statham) used to oppose Dom's team, but now, he's on their side and was even the subject of his own spin-off film.
"Dragon Ball Z" also centers on a team who's pretty forgiving. The most noteworthy example of this is Piccolo, a Namek alien who starts as Goku's rival, but when Gohan is born, Piccolo promises to protect him from evil. The same could be said of Vegeta, another Saiyan who always has a rivalry with Goku but eventually becomes an ally. This also holds true for Android 17 as well as Majin Boo, who was one of the biggest villains in "Dragon Ball Z" only to become comic relief later. Both series show how people can change if you give them a chance.
