add fin on the back of fishman players，their arms(like kuroobi)or even on their side faces and randomly add arlong's nose
sadly gill and fang may cannot obviously display on steve's body,and there is no merfolk in mmnm which may need bubbly coral to walk on the ground
and make cyborg players arms are metal looks like queen(terminator t800's red eye would be cool lol and even half face is covered by machines either)