I recently did something with my cab that I'd really like to see done online.
I assigned a button on each player side to turn them into noob saibot or switch the other players color pallet to rain if they're noob. and then various other cheat.dat stuff.
If they brought back noob saibot like they did for wavenet, they could also add the same code for player 2 to enter before the match that turned noob saibot into rain... so the opposite player could decide if they wanted to fight noob or rain... same player only you can see one...