Donald Duck's Speedboat was ready for release before being cancelled for reasons unknown.
It was cancelled so late in fact that a prototype box and several screenshots had already been shown in European Atari 2600 catalogs. Speculation is that the Children's line-up wasn't selling as well as Atari had hoped, and they pulled the plug on the whole operation.
Donald Duck's Speed Boat is a racing game where you must help Donald Duck maneuver his speedboat through an obstacle course of deadly rocks, dangerous whirl pools, and other water hazards as fast as possible. Depending on how quickly you finish the race your nephews will award you either a Bronze, Silver, or Gold cup. The concept of the game may sound quite simple, but the gameplay and challenge it provides is nothing short of outstanding. Winning gold requires wizzing through obstacle after obstacle at breakneck speed and even one error will end your gold cup fantasies.