The Gist: a feature-length CG movie covering the Osaka Arc from the Gantz manga. This arc is between halfway and two-thirds through Gantz’ 383-chapter long story, which means the movie had to shed several characters and a ton of build-up to present a manageable story. For example, the manga’s co-protagonist Katou gets a modified introduction right at the beginning of the arc, which serves as a brief introduction to the rules and world of Gantz for the viewer.
Generally, the changes ‘function,’ from the standpoint of making a coherent movie, but that movie is not very compelling. Despite cutting characters, the arc requires introducing the Osaka team, which is huge, even if its only there to be blown apart. The arc also pits our heroes against a massive challenge, with no room for that core cast to build-up credibility for taking on that challenge, nor an emotional connection with the viewer should they fail.
The result is somewhat like asking the third Lord of the Rings movie to work as our only ‘movie’ adaptation for the novels. The viewer will probably understand what is going on, but why would they care?
The Verdict: From a technical standpoint, Gantz:0’s character models, lighting, and sets are decent but not mind-blowing. The lip sync isn’t spot on, the lighting and framing don’t feel like they highlight scenes clearly, and the shakey-cam is oh my god stop it! Overall, it lacks thought or style.
There’s some irony to this because Gantz’ weapons and vehicles were already CG-rendered in the manga, and the manga did a great job framing out scenes and conveying what was going on.
Unless you are already a Gantz fan, it’s difficult to see a reason for you to watch this. Unfortunately, if you are a Gantz fan (especially if you’ve read all 383 chapters of it like myself), you’re not going to get much out of this either.