Ultimate Missions: Universe (cancelled) was a cancelled supplemental book containing scenarios and maps revolving around pieces from the Universe set. According to amazon.com, it was scheduled to release on September 28, 2005. However, with the financial failures of the previous three Ultimate Missions books, the book was cancelled. The next set containing a scenario book was the AT-AT Imperial Walker Colossal Pack, providing new scenarios and an AT-AT Imperial Walker Figure.