Endless Waltz, a sequel to the successful TV series Gundam Wing, is a fitting conclusion to the After Colony continuity, and manages to make improvements to the series in just about every way. The fights are more interesting, each Gundam has been given a re-design, and the animation/direction is overall more detailed and interesting.
The plot: One year after the end of the TV series, Earth and its space colonies have come to terms, ending a costly war with peace throughout the solar system. Just as the pilots of the near-invincible Gundams have sent them to be destroyed, one space colony secedes from the new world government and declares war. Lines of loyalty are quickly drawn, and the the five pilots are soon fighting each other to resolve this final conflict. Nearly every character from the TV series appears, leading to some surprise revelations.
If you have not seen the original series, good luck, because this movie will fail as a stand-alone title: as a conclusion to the series, it assumes the audience's knowledge of events and relationships from the entire 50-episode series, which is no easy task. However, as a conclusion to the series, it continues to build upon its stronger points, including the philosophy of battle and the complex array of allegiances that are built.
As I watched the dubbed version, I realized that the voice acting is for the most part quite good, but like the TV series, the English writing suffers now and then. Still, the writing here is an improvement, and the conversations had a better flow. My vote for best exchange in the series: "See for yourself just how powerless you are!" "Roger that".
Unfortunately, the movie lacks a good villain, with the young daughter of the series' primary antagonist rarely seeming that dangerous. It was darn hard to tell exactly what was happening at certain points, and the Gundams naturally follow the rule of being indestructible, "except Sometimes". On a smaller note, the movie's 4:3 aspect ratio proved no less bothersome than it had in the 49 previous episodes, I would have preferred some slightly larger width to go along with the boost in animation quality.
An interested observer (but not a "fan") of Gundam Wing, Endless Waltz proved to be a pleasant surprise, so I will take a leap here and say that if you were indeed a fan of Gundam Wing, this movie might just satisfy your desires. As the end to a series with some worthwhile thoughts about war, the movie's thesis that history is an endless waltz of war, peace, and revolution is a lovely bit of food for thought, the kind of thing I watch anime for in the first place.