"Mario Kart Wii" was officially announced at E3 2007; the online features and the first footage of the game were shown at the Expo. During Nintendo of America CEO Reggie Fils-Aimé's presentation, he unveiled the game via a trailer that showed some of the new characters and tracks. The trailer also displayed that the game would include up to twelve simultaneous racers. Additional details of the game were later released in conjunction with the Nintendo Fall 2007 Conference held on October 2007, where it was revealed that it would include bikes and the Wii Wheel. New gameplay footage from the game was also shown, and the release date was revealed to be set for spring 2008.