I like the Idea of Young Justice aged up and getting a kind of uniform as outfits (logically each varied depending upon the person). I take here the Team SHIELD of WWE as inspiration.
Tim takes the role of brain of the team
Conner takes the role of the powerhouse
Cassie the role of the never-giving up fighter and team-leader
Bart a bit the role of the fun-maker
I especially always liked the relationships between the Team-members, Conner and Bart always reminded for example on Triple H and Shawn Michaels or Randy Orton and Matt Riddle of WWE.
In Season 3 of the Anime Young Justice Conner was wearing such a kind of mask when he and other members freed the Meta-Humans.
I like the Idea of Conner with Sleeveless Vest, Sleeveless Shirt with Hood, Mask which covers his lower-face
Cassie more like the biker Wonder Woman, also with Mask and Sleeveless Shirt with Hood
Bart a black Flash Costume with red Applications
Tim the Red Robin Cowl Outfit, but almost completely in black