Highlander II - The Quickening

Much criticised sequel to the original movie. Set in the future (after Duncan McLeod got the gift of mortality for being the last immortal), brings in an alien race, a planet-wide energy shield, resurrects other immortals, and otherwise contradicts the plot of the first film. The directors' cut "Highlander II: The Renegade Version" is said to be a great improvement on the original release.