The Crew’s first expansion is coming on November 17th, and Ubisoft has dropped a looooong post on its website that examines the various feature-adds. Wild Run includes something called FreeDrive Challenges, which are basically player-created missions, and FreeDrive Stunts, which are a series of escapades that get progressively more difficult as you complete them.
Wild Run also includes a monthly tournament called the Summit as well as new vehicles, because what sort of driving game expansion would omit new things to drive? Chief among these are the new motorcycle family and three new vehicle specs.
If you play The Crew on your PC, you can experience the Summit during the expansion closed beta that begins on October 15th.