Cars 6

Cars 6 is an upcoming American 3D computer-animated Sports Comedy-drama film from Disney and Pixar. Directed by Pete Docter, it is the fourth and final installment in the franchise and a sequel to the 2017 film Cars 3.

Plot
The film opens in the last race of the 2006 Piston Cup stock car racing season and championship in the Motor Speedway of the South,

where a skilled but arrogant rookie racecar Lightning McQueen has overtaken his opponents, past a huge wreck, and has built up a huge lead over the cup's defending soon retiring seven-time champion Strip  The King  Weathers and perennial runner-up Chick Hicks. However, because of his refusal to make regular pit stops and get new tires, his rear worn tires burst into flames on the final lap, causing him to skid and ultimately crawl to the finish line, barely managing to tie the King and Chick Hicks in a photo finish by sticking his tongue out at the edge of the finish line. Race officials announce that because the three racers are also tied in overall season points they will compete in one final tiebreaker race to be held at the Los Angeles International Speedway in one week to determine the champion.

While traveling down Interstate 40 to California, Lightning becomes separated from Mack, his transport truck, and while trying to catch up becomes lost on US Route 66, catching the attention of the local Radiator Springs on the process. A chase ensues, during which Lightning crashes and gets tangled in wires, damaging part of the town's main street in the process.

Lightning is taken to traffic court, where the town's attorney Sally Carrera pleads against Lightning. He is sentenced to repave the road using "Bessie '', an asphalt-laying machine. Only interested in leaving and extremely furious, he makes an escape attempt before being hooked up, only to figure out his gas tank was siphoned. Lightning rushes through his first day of paving and the new road surface is so bumpy, unusable, uneven, and poor that he is told he must scrape it off and start over again.

When Doc Hudson offers Lightning a deal beat Doc in a race around Willy's Brute and he is free to go, Lightning eagerly accepts. He leaves Doc in the dust at the starting line, but loses control on the loose dirt turn and crashes into a cactus patch. While the town's tow truck, Mater hauls Lightning out of the cactus patch in which he landed, Doc effortlessly cruises to the finish line after informing Lightning that he races like he fixes roads. Lightning is compelled to scrape off the botched pavement and start over again. After Lightning completes a section of the road for the night, Mater asks if he would like to do something fun. He finds out that Mater was talking about a game called "Tractor Tipping." Lightning tries to back down but is convinced by Mater. Mater shows him how to tip a tractor. He sneaks up to one sleeping and suddenly blares his horn causing the tractor to react and tip over backward and fart (backfire). Lightning having a go approaches a tractor with Mater urging him to do it. Lightning then roars engine waking ever tractor in the field with all of them tipping over and farting all at once. They have a laughing moment, but suddenly awake Frank, a red combine harvester with the personality of a bull who chases them out of the field by threaten to grind them up with his blade.

As the ensuing days pass, Lightning is disturbed by nightmares of Chick Hicks winning the Piston Cup and landing Dinoco. He starts to befriend the town's residents and learn more about the town in the process: how Radiator Springs was once a thriving town until completion of the nearby interstate bypassed the little town, depriving it of its business traffic and visitors and ironically, depriving those passing visitors of the natural beauty found in the scenery along the old highway, how Sally left behind her rich but unhappy life as an urban lawyer, what tractor tipping is, and how Doc Hudson was once a famous racecar himself the Hudson Hornet and 3-time Piston Cup champion -- until a horrible crash in 1954 ended his racing career.

Doc bitterly refuses to reveal much about his past despite Lightning witnessing him expertly drifting through the loose dirt of Willy's Butte where Lightning crashed, labeling his old trophies as a bunch of empty cups.

By the time Lightning finishes repaving Radiator Springs's main road, he has formed a bond with the town and its residents. Rather than immediately leaving for California as he had initially been eager to do, he spends the day touring the town's businesses, receiving a fresh coat of paint and new tires in the process, and participates in a cruise party that night. But he is suddenly found, then whisked away in his truck, Mack, without even a chance to bid farewell to Radiator Springs. The town's residents are sad to see him leave, and Sally is grumpy to learn that it was Doc who ultimately informed the media of Lightning's whereabouts.

The final race among Lightning, the King, and Chick opens with what the race's commentators call the biggest race in history. Lightning is distracted by his memories of Radiator Springs, losing time to The King and Chick Hicks, and begins to fear he will simply lose. To his surprise, Doc Hudson has arrived at the race, with Mater and a few others from Radiator Springs who will serve as his pit crew, Doc, once again wearing his original Hudson Hornet racing stripes, takes over as Lightning's crew chief. With Doc's coaching, a record-fast pit stop for new tires, and a few tricks learned from the small town's inhabitants, Lightning is not only able to overtake his opponents, but has built a considerable lead by the final lap.

As Lightning approaches the finish line, Chick sideswipes The King in a desperate attempt to avoid finishing behind him yet again, sending The King into a terrible rollover crash. Lightning, fearing that the King's racing career will end in the same way as did the Hudson Hornet's, comes to a full stop right before the finish line, choosing to accept loss. After Chick gleefully crosses the finish line and celebrates his victory, Lightning then backtracks to push the veteran racer across the finish line ahead of him, saying that "I think the king should finish his last race!" Although Chick Hicks has officially won his first Piston Cup title, he begins to learn that it's a hollow victory as he is jeered and despised by the fans and media for taking out the King, while McQueen is cheered as a hero for his good sportsmanship. Tex from Dinoco, The King's sponsor company, offers to support Lightning as his new sponsor, but Lightning, having now had a change of heart, respectfully declines, saying that his current sponsor Rust-eze gave him his, big break, and he wanted to continue with them.

Two days after the race, Lightning returns to Radiator Springs, announcing that he will establish his racing headquarters there. This helps to revitalize the town and draw back visitors and tourists, with the once-abandoned Route 66 being reclassified as Historic Route 66.

Cast

 * Owen Wilson as Lightning McQueen
 * Larry the Cable Guy as Mater
 * Bonnie Hunt as Sally Carrera
 * John Ratzenberger as Mack

Trivia

 * This is the first and ONLY Cars film to be directed by Pete Docter.