Rocksteady's Rumoured Justice League Game: 16 Features It MUST Include
8. Next Generation Character Skins
The costumes in the Arkham games gave us access to alternate Batmen and members of the Bat-Family from all around the DC multiverse. It's going to be amazing to see this applied to all of the big Justice League characters and is almost a given that pre-order and DLC costumes will return for this game.
Have a quick look at the different Robins that Batman has been partnered with gives us several different characters, all of whom had different combat styles, skillsets, and personalities while in the role. As they grew (or died and were resurrected in their graves), they took on different identities like Nightwing, Red Hood, or Spoiler and again evolved their combat styles away from what Bruce taught them.
Simply having skins that graphically change a generic Robin character so that it looks like any of these people isn't good enough to make Dick Grayson feel like Damian Wayne, or have a player controlling Superman feel like they're playing as Superman Blue/Red.
Skins should be advanced enough to overhaul the character completely if they need it; giving them new abilities, movements, voices, and even reaction lines from other characters when the skin is active.