 If you liked
One Piece Movie 08: Episode of Alabasta - Sabaku no Oujo to Kaizoku-tachi
|
 ...then you might like
Gintama Movie 1: Shinyaku Benizakura-hen
|
A lot of series have recap specials/episodes that recap a season, half of a season or maybe multiple in one? However, these decide to take that approach by not only simply remaking one arc but reanimating and pretty much just recreating everything in the process. These may not add a crazy amount more but they do a solid job retelling the story of an arc in movie format rather than episode format like how the series did them.