Speed Racer ending explained (spoilers)

[Rodneyarife]

Speed Racer (Emile Hirsch) wins the Grand Prix. He and his family celebrate and he finally kisses Trixie (Christina Ricci). Royalton is arrested after the cameras on the race track show that Cannonball Taylor cheated by using a hook (with Royalton's logo) that was attached to Speed's car. Inspector Detector and Racer X (Matthew Fox) are glad that Speed helped bring Royalton to justice and that he's changed the world of racing. Inspector asks Racer X if he regrets not telling Speed and the family that he really is Rex (Speed's older brother) and X replies that it's his mistake to deal with. Flashbacks show that on the day of the Casa Cristo cross country race, Rex blew up his car and then had surgery to change his face.