The full name of Movie 8 is actually One Piece Movie 8: Episode of Alabasta: The Desert Princess and the Pirates. Could it get any longer?

Here is the plot summary:
A retelling of the Alabasta arc with new music and some new animation. While essentially the same story the movie excludes a few bits such as the Navy involvement (thus Smoker and Tashigi are absent) and the Rainbase stop (no Mr. 3 is present as a result), presumably for length of time. As well as changing some things like Mr. 2 meeting Sanji on the Going Merry, but not touching his cheek.