In an interview found in an advertisement for the movie “Dragon Ball Super: Broly” translated by KanzenshuuAnimation supervisor Naohiro Shintani talked about the process of redesigning such a popular character:
“Broly is a different story. However, the only designs I get are because of him wearing his armor, which gives a very different impression than the Broly of the past. Personally, I have a Broly’s very strong image was based on previous movies, so I created my design for him at Full Power from scratch, I just wanted to see him lose his shirt and run around at the last minute. Toriyama has said that he doesn’t want him to be overly masculine, so I aimed to make him look as big as possible, but still within the bounds of not going overboard with it.”
Toriyama’s desire to reduce Broly’s sheer size is understandable. In the previous intermittent “Dragon Ball Z” movies, Broly is basically the Saiyan version of the Incredible Hulk, green hair and all. While Broly will maintain some of his massive size and still be larger than most “Dragon Ball Super” characters, there are more restrictions on his character design this time around. .
https://www.slashfilm.com/952863/akira-toriyama-had-one-rule-for-dragon-ball-supers-broly-redesign/ Akira Toriyama Has A Rule For Dragon Ball Super Broly Redesign