He keeps his knife tail from Other M, and clearly integrates his Super Metroid (overall skin color, wing color and hands) and Metroid Prime (mechanical armor and yellow/gray color scheme) designs as well, keeping most of the popular elements from every version of this character. If the in-game model were better this would probably be the best consensus restoration of this character, and given Prime 4 is likely right before this game in Canon it's possible we see a design super similar to this one for that game. Meta Ridley is arguably his best boss fight, but the design doesn't have him use his tail for much other than balance. This design allows for the tail usage of other M and Super metroid's Ridley without the poor head design/outdated sprite of each respected design.