I wish the entire Movie would look as awesome as that shot. It just feels weird to have several different artists working on the Movie, with the art design changing throughout and some obvious CGI models thrown in. Why can't it look consistent from beginning to end?
This movie's specific intent is to celebrate the various skilled key animators and animation supervisors who were invited to work on it. While Japanese animated series have typically done this since the inception of the industry it is especially important within the context of the Dragon Ball franchise because since Yamamuro Tadayoshi took over as the character designer and animation supervisor of the films beginning with 1993's 燃えつきろ!!熱戦・烈戦・超激戦 (Burn Up!! A Red-Hot, Raging, Super-Fierce Fight, the first Broli film) he has become increasingly overbearing as an animation supervisor in correcting the key animators' drawings to look more like if he drew them. This became very noticeable during the 2000s and 2010s and became particularly painful because as an illustrator, character designer and animation supervisor Yamamuro declined in skill. Yamamuro used to be a really good animator in the early and mid-1990s but old age and not challenging himself really weakened Yamamuro's powers as an illustrator and animator. Whenever skilled animators would work on modern Dragon Ball Yamamuro would alter their work and weaken the strength of their drawings and timing to make them more on model with his character designs as opposed to their off-model drawings that looked better uncorrected.
Eguchi Hisashi famously took to Twitter and discussed with
Satou Masaki how when he was invited to work on the 2015 film (for which Yamamuro was the character designer, animation supervisor, storyboard artist and director) he was told that he would be allowed total freedom to ignore the storyboard if he liked. Eguchi's work was then completely altered to fit the storyboard again. Both he and Satou, who had been heavily involved with the old Studio Junio and in-house Toei Animation episodes of the first two series, agreed that Yamamuro had stuck with Dragon Ball for too long and was now just a big fish in a little pond, exerting his influence over those more skilled than him. Back in 2013 young ace animator Kameda Yoshimichi also famously took to Twitter to comment on how much he hated the look of the then up-coming
Dragon Ball Z: Kami to Kami (Battle of Gods) trailer, saying that he wished they had gone back to Maeda Minoru's softer style.
Anyway, Dragon Ball Super came around and since the schedule was so bad naturally some animators managed to sneak in nice scenes that were off-model but drawn better.
Tate Naoki was finally able to return to the franchise after briefly working on the 2008 special and instantly became the series' main action animator (not that they gave him that well-deserved title officially, unfortunately). His
scenes in Episode #26 truly felt like they had brought Dragon Ball back to a modern feel and even though there were some corrections on his work for the
Tournament of Power and Tate in general ignored his modern webgen-inspired style he was still showing off exciting battle scenes for modern Dragon Ball.
Other animators who managed to sneak in their unique styles without being corrected by Yamamuro like they were on the two modern films were
Shida Naotoshi and Takahashi Yuuya. Shida's
big scene for the 2013 film was dampened in intensity by corrections from Yamamuro that changed the intense facial expressions that Shida is known for to match the emotionless character designs that Yamamuro designs. For Takahashi Yuuya, he grew up watching the original run of the series as a child and has always been influenced by Yamamuro's work as animation supervisor for the Broli, Janemba and Hirudegarn films. Shocking fans, when Takahashi was finally given a shot to be animation supervisor by being one of the animation supervisors for
Dragon Ball Super Episode #114 he animated and corrected the others under his supervision so that their drawings looked like they were from those three films that he was so inspired by as a child. We Dragon Ball animation fans were incredibly shocked to see someone replicate so incredibly well Yamamuro's old style. Takahashi then did the same for a section of
Episode #122, further shocking us. When Takahashi returned as a key animator for Episode #131 his faces were unfortunately corrected by Yamamuro to match Yamamuro's modern style but if you look at Gokuu's leg muscles they still match Takahashi's Young Yamamuro-inspired style.
Takahashi is actually very prevalent in this third trailer, in part because he was invited to work on the film as an animation supervisor specifically because of the reaction to his style that he showed off in Episode #114 and Episode #122. The close-up of Broli with a vein on his face, the shots of Super Saiyan God Vegeta and the shot of Super Saiyan God Gokuu being slammed through that wall of ice were supervised by Takahashi. Meanwhile, the Super Saiyan Blue Gokuu punching Broli was done by Tate Naoki.
So, why is the animation inconsistent normally? Production schedules also play a part in that. For example, the production schedule for Dragon Ball Super was so bad and Yamamuro's designs so clunky and difficult to animate that multiple animation supervisors would have to be used for a single episode. The animation supervisor role is to the correct the drawings of the key animators to bring about a sense of unity within the episode but in modern productions schedules are so short thanks to poor planning from producers and the increased quality of Japanese cartoons since the late 1990s that more staff is necessarily to meet the broadcast or the release of a film. Movie #20 Character Designer Shintani Naohiro wouldn't have the time to correct all 1,800 shots in the film by himself, anyway, because production has only begun in earnest in the second quarter of the year. Assistant Animation Supervisors are necessarily to help raise the quality of less than great animators or animators who have to do work very quickly. With Takahashi, Tate and Oonishi Ryou (another young ace animator at Toei) acting as animation supervisors and providing a lot of key animation themselves it'd be pretty silly to not let them run wild, anyway. Then there's veterans like Shida Naotoshi and Hashimoto Takashi working on the film, too and they have their own unique styles and it'd be silly to try to 'unify' those, too.
Basically, this movie is a big thanks to animators and fans for putting up with Yamamuro's **** for the past sixteen years since his decline spiraled out of control.