An interesting video has been published by a YouTube channel called PtoPOnline. Discussed in the video, is the canceled sequel to Rare's Diddy Kong Racing, originally released on the Nintendo 64. The sequel would have been titled Diddy Kong Racing Adventure, and would have been slated to release on Nintendo's GameCube sometime after 2004, when the game was initially pitched. But things wouldn't get that far, as Nintendo did not accept the project, resulting in its cancellation. The most important part of the video is it showcasing a tech demo for the proposed sequel, with early footage of how the game looked. Despite being pitched for the GameCube, the demo runs off of an Xbox, as that was what developer Climax used to work on their games with at the time. Adventure would take place sometime after Diddy Kong Racing, and would have the villain "Wizpeg" from the original game returning in order to take revenge. He would turn Diddy Kong's island into a series of race courses, and it would be up to Diddy and his friends to complete all the tracks in order to take back the island. The concept of the game detailed that there would be a hub-world that would contain 6 different zones to race through, and that there would be multiple types of vehicles, including bikes, planes, and skis, as well as 14 playable characters, potentially including Banjo and Kazooie. In the demo, players could ride a Rhino, implying that you could ride animals as well, similarly to Rare's other canceled racer, Donkey Kong Racing. You can find more details about the demo in the video linked above.