Nostal I think.....you should do Custom Attires like from WWE Games.
Where you use custom textures by drawing them with the Controller. So If you want you can make a rainbow hair possibly.
Or, a special offiuit like Dragon Ball AF Goku Coustume. (This Works for all characters and, Created characters.)
Also custom moves say if kamekameha is blue you can change it to Red. And, for attacks you can have multipal movesets.
Finally, Custom Voices for Created Characters using your voice! Customize your voice change the pitch (For this feature you need a kinect or a Headset in gamechat.). Type subtitles for your character.