Rise and Fall of the Shi'ar Empire", examines what would have happened to the Shi'ar Empire if Vulcan had absorbed the energies of the M'Kraan Crystal instead of Professor Xavier, and become the Phoenix.
The story "Rise and Fall of the Shi'ar Empire" examines how the Shi'ar Empire might have fared if Vulcan had absorbed the power of the M'Kraan Crystal instead of Professor X, leading to the creation of the Phoenix.